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Stem Cells

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SciShow

SciShow

Күн бұрын

Hank gives you the facts on stem cells - what they are, what they're good for, where they come from, and how they're used in medicine.
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Пікірлер: 2 500
@papidaddy4329
@papidaddy4329 7 жыл бұрын
"Why aren't we funding this ?!" - Peter Griffith
@timabsten7236
@timabsten7236 7 жыл бұрын
lol that episode is funny when thy are at mcburger town
@nallelyflores-garcia5694
@nallelyflores-garcia5694 7 жыл бұрын
Papi Moneybags because people think it's wrong taking the embryo's life away even if it is only a couple weeks old. It's a fight of ethics and morality...though I'm not for or against it completely because both sides bring out good points. It would be great research material, but you'd be killing these embryos, babies (whatever you please) embryos unless they were aborted...so yea
@Aeturnalis
@Aeturnalis 5 жыл бұрын
"I hate being all strokey"
@jquick85
@jquick85 4 жыл бұрын
A guy called me to offer stem cell therapy today and I went “hmmmm..yeah...ahhh...yeah. Yeah. yeah. yeah.” And then I came here.
@thetruthfulchannel6348
@thetruthfulchannel6348 8 жыл бұрын
Why are we not funding stem cell research better? We need to get rid of needless regulation. Biotech needs to be advancing at a much faster rate than it is right now.
@girlythingsaw
@girlythingsaw 8 жыл бұрын
because of how the cells are collected. embryonic stem cells not only comes from the clinics but from embryos that were aborted. with politicians trying to ban abortion no matter how much you fund it there's not going to be enough to use and research.
@danielmccarron7745
@danielmccarron7745 8 жыл бұрын
+girlythingsaw Embryonic stem cells cannot come from abortions... They have already differentiated into different cells by the point that an abortion would be carried out as stem cells are only present in fertilized eggs for 4 or so days before they start to differentiate.
@Rivergirl2878
@Rivergirl2878 8 жыл бұрын
We can clone anything and change the genes of humans. We don't do this because it's immoral but biotechnology is very advanced.
@thetruthfulchannel6348
@thetruthfulchannel6348 8 жыл бұрын
RiverGirl How is it immoral? There is literally nothing immoral about it.
@thetruthfulchannel6348
@thetruthfulchannel6348 8 жыл бұрын
Daniel Appleton Ardent right wing fundamentalists / evangelicals should not have their opinions taken into account or their votes counted.
@zxsdwe170
@zxsdwe170 8 жыл бұрын
Do u even breath when talking 😳
@formerctgovernordannelmall1452
@formerctgovernordannelmall1452 8 жыл бұрын
lol, editing takes away the need for oxygen, foolish mortal!
@haroldinho9930
@haroldinho9930 4 жыл бұрын
It’s through his nose
@muhammadzaki4840
@muhammadzaki4840 4 жыл бұрын
No he doesn't 😂😂😂
@dominikskorjanc
@dominikskorjanc 4 жыл бұрын
0:34
@leoxu7826
@leoxu7826 4 жыл бұрын
course not
@heathermiller9299
@heathermiller9299 10 жыл бұрын
I had a couple of surgeries where they took bone marrow from my hip and spun the stem cells out. They then placed the stem cells in my ankle to grow a new ankle bone. They were my stem cells.
@XxXVidmanXxX
@XxXVidmanXxX 10 жыл бұрын
My friend and I have a game going on. We go through each video on this channel and just from the title predict % of religious/anti-religious comments. I said around 75%, underestimated it seems
@Arbiter1259
@Arbiter1259 10 жыл бұрын
I'm gonna have too much fun with that idea
@marisaleo6526
@marisaleo6526 8 жыл бұрын
MY BIOLOGY TEACHER ASSIGNED WATCHING HANK AS HOMEWORK MY WORLD IS COMPLETE
@callumayres3001
@callumayres3001 4 жыл бұрын
Now you don't have to Mmmmmmmm through a news report, just this video.
@__-xl1zi
@__-xl1zi 5 жыл бұрын
When I'm older, I wanna get liver cells so I can drink to my heart's content
@itarry4
@itarry4 3 жыл бұрын
As someone who has chronic liver disease because of the amount of antibiotics I needed once to kill a virus that was attacking my heart I could really use these now. My heart still wouldn't be content but at least I'd have a liver that worked well. It's bloody annoying I didn't even get the fun of over drinking to damage my liver which seems massively unfair. 🍻😎
@peepeepoopoo3845
@peepeepoopoo3845 3 жыл бұрын
Hahah
@CEELOS420
@CEELOS420 10 жыл бұрын
love the style HANK ! EDUCATIVE, ENTERTAINING AND FUNNY
@izzyp1162
@izzyp1162 3 жыл бұрын
"like a college grad school graduate" damn i felt that hahaha
@sixk7121
@sixk7121 7 жыл бұрын
We just watched this in my science class. My life is complete.
@ThePatrickaz80
@ThePatrickaz80 11 жыл бұрын
Great video! The more information the public has the better decisions we can make. Keep up the great work.
@MsStonedAgin
@MsStonedAgin 10 жыл бұрын
Perfect for my research paper.
@randompersoncookie
@randompersoncookie 8 жыл бұрын
that recent college grad comment hit way too close to home ;-;
@Mythril
@Mythril 8 жыл бұрын
don't worry friend. im with you in the same position ;__;
@MrWolfgeng
@MrWolfgeng 11 жыл бұрын
Nat-geo or discovery channel should pay you a butt load of cash to have sci-show on their channels. You have my vote.
@chefkendranguyen
@chefkendranguyen 11 жыл бұрын
Good information as usual.
@lightlittlebrownboy
@lightlittlebrownboy 11 жыл бұрын
"Life begins at conception." Their is so much wrong with this on so many fundamental levels.
@iloveschool101
@iloveschool101 11 жыл бұрын
i leaned about steam cells in my Bio class this week, so perfect timing for this video.
@chinookvalley
@chinookvalley 4 жыл бұрын
Hope you graduated - after learning how to spell.
@luisfelipevaldes5306
@luisfelipevaldes5306 4 жыл бұрын
same
@claymountain1300
@claymountain1300 10 жыл бұрын
"who has time to know what stem cells are?" Well people that like go to school
@marthastokeworth9956
@marthastokeworth9956 10 жыл бұрын
You beat me to it! :) We learned this in school as a basic thing
@terminallyonlinezillennial
@terminallyonlinezillennial 10 жыл бұрын
Jelena Jelisavcic Bebec yeah same, but this is good revision, and I guess because this is a more recent thing it wasn't taught in school to the older generations, which are probably the ones making the "Mmm..." notions whilst listening to interviews and stuff on the radio pretending to understand what's going on.
@marthastokeworth9956
@marthastokeworth9956 9 жыл бұрын
That is okay for people who want to learn, but we were commenting on the question "who has time to know what stem cells are?"
@inayahcee3131
@inayahcee3131 8 жыл бұрын
WHAT?! HOW DID I JUST DISCOVER THIS? I've been a nerd fighter since the beginning of TIME!!!
@followlauren
@followlauren 9 жыл бұрын
Saw this in my BIO class for college and probably one of the more informative videos even if it was clear and concise! Subscribing to you! :D
@thomasbarlow4223
@thomasbarlow4223 6 жыл бұрын
We love you Hank
@laflame7631
@laflame7631 7 жыл бұрын
Dude I click the reference link for this episode and it takes me to buy Instagram Followers. WTF!?!?!
@bridge9297
@bridge9297 10 жыл бұрын
living bacon + embryonic stem cells + nutrients = INFINITE BACON!!!!!!!!!
@Jon-uf2uj
@Jon-uf2uj 9 жыл бұрын
Bacon doesn't live dipshit
@bridge9297
@bridge9297 9 жыл бұрын
joni mehmeti fetuses dont live, they grow, why? because they are given nutrients, just make an artifical bacon womb.
@Jon-uf2uj
@Jon-uf2uj 9 жыл бұрын
Of course. Sorry, I keep ignoring the fact that you came out of an artificial donut womb.
@josephalexander6290
@josephalexander6290 9 жыл бұрын
+' Bridge ' Well isn't living bacon... just a pig?
@briansouthparkstudio1357
@briansouthparkstudio1357 8 жыл бұрын
+Fatjon “Lucky” Mehmeti ........ you know they can "print" bacon.... any food really of 3D printers. cost a pretty penny for the printers good enough to do so thou
@georgyorgy2
@georgyorgy2 8 жыл бұрын
0:30 Video start
@iKhanKing
@iKhanKing 11 жыл бұрын
You guys need to talk about Induced Pluripotent Stem Cells! The 2012 Nobel Prize winner in physiology won for exactly that, and that topic pretty much branches off into the frontier of modern biomedical research.
@23ajbulls
@23ajbulls 11 жыл бұрын
I was not in any way stating your analogy was weak, I only stated that using batter as a replacement for an embryo is not the best comparison. Your point is still valid.
@teamO_X
@teamO_X 9 жыл бұрын
why are not funding this!!!.....
@ciann11
@ciann11 8 жыл бұрын
+Darude Her Right In The Sandstorm™ at only 4/5 days its really not anything, never mind a baby. The embryos used were going to be thrown away anyway so at least if they're being used for stem cells they can save someone's life
@chalierobinson7569
@chalierobinson7569 8 жыл бұрын
+Alexishy stupid ass. the parents aren't going to use the leftover cells so they will die anyway. we might as well learn as much as we can before they do.
@christopherhernandez8856
@christopherhernandez8856 9 жыл бұрын
so if my arm was sliced off can i regrow my arm with thid stuff? lol
@christopherhernandez8856
@christopherhernandez8856 8 жыл бұрын
+Darude Her Right In The Sandstorm™ dude that's insane
@christopherhernandez8856
@christopherhernandez8856 8 жыл бұрын
+Darude Her Right In The Sandstorm™ then what age do you think you'll stay at, probably 35 your prime age.. or always looking young?
@christopherhernandez8856
@christopherhernandez8856 8 жыл бұрын
+Darude Her Right In The Sandstorm™ that's insane! I wonder when this will be available to the public, we can solve so many problems!
@christopherhernandez8856
@christopherhernandez8856 8 жыл бұрын
+Darude Her Right In The Sandstorm™ Peter Griffin voice: why are we not funding this!? lol but seriously why not? I wonder if it's cause they don't know how people would react if they realize we can technically become immortal
@christopherhernandez8856
@christopherhernandez8856 8 жыл бұрын
sounds like a plan hahaha
@mstr293
@mstr293 11 жыл бұрын
Johanna Persson Finally, another person that has the same epiphany as I do! You just made my day!
@BangerBilly
@BangerBilly 8 жыл бұрын
You just helped me SO much on my presentation dude, THANK YOU
@frederickwang888
@frederickwang888 7 жыл бұрын
isn't he in crash course?
@christopherhernandez8856
@christopherhernandez8856 9 жыл бұрын
hmmmmm hmmmm
@EnviousWingDings
@EnviousWingDings 6 жыл бұрын
I love Stem Cells, and I hope to be researching them in the future!
@pwrinklejohnson9782
@pwrinklejohnson9782 11 жыл бұрын
Another great topic,happy as always. I'm so glad I found your channel. Thanks!
@drsquash2003
@drsquash2003 10 жыл бұрын
It amazes me to see how aggressively, hateful some of you people can be. I ask those of you who blame religion (seems as though specifically, Christians, are the ones under fire mostly), to take and a moment, and consider this. Aren't we all human beings? Aren't we all born with essentially the same instinctual drive, to reach out and understand the world we live in? Aside from psychopaths, and Narcissists, we all have an innate sense of caring for our fellow human beings on this Earth. Especially in the case of children. Everyone hates those who prey on children, as the case should be. So why then i ask, do so many persecute Christians, so incredibly harshly on this subject? Is it truly because they feel we are holding back the wheel of progress, or is it simply that they feel convicted, and will deny that conviction in order to obtain their own selfish desires? I would hope that you would answer to the primary implication, as it affirms that you are not stubborn or selfish. Otherwise, you may as well stop reading, and continue on your hateful rants. If you are still reading, I ask this then. At what cost are we willing to pursue "progress", as it were? I understand, that science does not define an embryo, or even a fetus at that, as a living human being. But I can assure you, that a mother, who loses their child to miscarriage, or a still birth, would disagree. As a Christian myself, and also as a supporter of science, all I ask is that before you jump on Christians for taking a stance on embryonic stem cell experimentation, that you consider how you might feel, if you did believe like they do. I honestly believe that science, and God do not refute one another, and can coexist harmoniously. I know there are extreme fundamentalists, and crazies out there who think everything is the devil. But generalizing all religion, as a poison to society, not only undermines the fundamental principles of, how and why America was formed, but it too, halts the wheel of progress by, putting both sides of the matter on the defense. If we all take the time to walk in the shoes of another, that is how we will make the most progress. I pray that God will bless us all, and share with us the knowledge of this amazingly intricate universe he has devised for us to wonder at, and I thank God for instilling a desire for knowledge in my soul.
@Porygonal64
@Porygonal64 10 жыл бұрын
tl;dr
@quados2623
@quados2623 7 жыл бұрын
Read half way, it's not defined as living because it doesn't have a CNS (Central Nervous System) at the point where extraction takes place. You learn this in year 10-11 Biology and is very interesting to weigh out the reasoning behind why, it's mostly the class discussing morals and perspectives on the matter and our Teacher's offering us non-bias knowledge and strong cases for both sides, and everyone in the class agrees that research should be done as we all are told to make up our own minds, we all want to progress forward. Religion lately as well as old scientific regulations have been potentially stopping some or any progress in some scientific fields, from objective observation on research tests not going forward or being shut down completely. Stem cell research has the potential to perform new-mitosis of cells that before were not able to do so themselves, such as repairing or replacing worm synovial capsules in joints such as the knee at rapid rates where strength training is too far gone to have any significant affect, or even potentially creating new neurons in the brain where mylination may have prematurely worn out or neurons completely eroded due to a disease, if you have a high potency stem cell any replacement is possible, or if you have a pluripotent stem cell specific and quick replacement could be more than do-able. The moral question is do you deny the embryo or morula (Depending on point of extraction) the potential to grow into something more such as a child, the upside is that generally the extracted embryos are from the excess quantity that will not be used in creation of offspring. Meiosis is a complicated process with many reoccurring steps throughout the cell cycle, I do believe that more research into this field will save potentially billions of lives, simply because of the applications of such advancements that are within our grasp, such as the creation of micro-chamber hearts. The real debate is centered around Cloning. Miscarriage or birth is partially due to meiosis phases not carrying out the processes correctly, this could be due to chromosomes not matching correctly or missing chromatids that cause the offspring to not develop as intended, such as a third 21st chromosome resulting in down syndrome, while individuals who are affected with a third chromosome are mentally impaired, a majority are still able to function as productive members of society in some shape or form. With advancements in areas such as stem cell research and genetic engineering, we could rid humans from ever having to face these problems in the first place or even help existing cases with the flexibility and potential of stem cell manipulation and genetic engineering. Again it all comes down to morals, what is seen as acceptable and where we all think this technology is heading. I'd love to see it change lives for the better and save many more. On the topic of religion, I find it's like with any group, there is a prejudice bias against individuals who are identified with the greater whole even if you don't outwardly identify with that majority. I've met many religious individuals who are well kept, amazing and logical down-to-Earth people, who anyone could get along with, on the other hand through personal experience I have also met the polar opposite. I'm sorry that you have to face this discrimination bias. I'm not against religions that are peaceful and offer a good way of life, and moral values, however as of recent events religion is mainly under attack because of Muslim beliefs and how their fundamentals can't co-exist with Western societies values and way of life, and I absolutely agree with you, religion and science can co-exist with each other, not being religious myself but living near 5 churches, my entire neighborhood is filled with good spirited people with happy families who are very giving and social, not only this but the diversity of cultures that are getting along is almost something to marvel at. I also love your outlook on exploration of knowledge and positive attitude towards the topic, need more of that in these discussions! I used to go to Church every Sunday with my old friends but now find myself sitting on the line of Agnostic, but would mainly say I am Agnostic to avoid getting entangled in the conversation of Religion Versus Science as it seems to be two very radical sides that lack discussion. In the end Science and Religion are two belief systems, Religion being a very old system that has kept communities together and given morals and guidelines to those who have followed them (Whether those be negative or positive). Science giving knowledge and progression to our understanding of the world and other surroundings from an objective standpoint (Also having a negative and positive in how it is used). Both are belief systems although Science undergoes constant adaptation, Religion I see as more of an ancient version of Science, a way to comprehend our surroundings. Both have their place where they thrive. Although I'm very 'iffy' about comparing and contrasting science and religion as it doesn't bring up discussion that is extending my knowledge and generally creates a very negative reaction from others. It is how ever good to see other opinions on the matter to challenge any information bias or close-minded opinions, love seeing other perspectives keep it up.
@iKhanKing
@iKhanKing 11 жыл бұрын
I agree, all stem cell research is important, and it's a field of study I'm definitely interested in. I just think people are way to quick to attack opponents of it, because it comes down to each person's core philosophies
@sexoreligionpolitica
@sexoreligionpolitica 11 жыл бұрын
Shoot, sorry for jumping in here but I'm writing my thesis on IPSC's and I have to say, I am not even arguing about hESC's, I'm all for it but IPSC's are exciting. The idea of "de-specification" of cells, particularly skin cells does make a great route for this field to take. I do believe however that learning more from hESC's will shed light on all other cell development research, including IPSC's. Just a comment, good day all
@tessagray9574
@tessagray9574 Жыл бұрын
What to say, the Green brothers always have amazing things to say and do amazing videos
@Thesprinkles98
@Thesprinkles98 11 жыл бұрын
my science teacher sent me to this video and I'm glad she did!!
@StanVadenZA
@StanVadenZA 11 жыл бұрын
Look at what you've done, Hank!
@DUCKDUDE4100
@DUCKDUDE4100 11 жыл бұрын
Now here is a person who can talk to everyone.
@jldestruction
@jldestruction 11 жыл бұрын
Post more, I need it for my research paper!
@23ajbulls
@23ajbulls 11 жыл бұрын
Sorry to clarify, any issue subject to a scale can succumb to a slippery slope, but some intermediate positions are backed up well enough to end the slipper slope.
@sparta2727
@sparta2727 11 жыл бұрын
Making time for learning!!! Never thought I would say that
@MoiraMcGill
@MoiraMcGill 9 жыл бұрын
Stem cells can also be found in the umbilical cord. So a fertilized egg doesn't have to be..uh...harvested, the stem cells from the umbilical cord could just be used after giving birth.
@bensemusx
@bensemusx 9 жыл бұрын
The fertilized eggs that are harvested were slated for the waste bin. They are using leftovers from the fertilization to get the stem cells.
@kayvee256
@kayvee256 11 жыл бұрын
I know you know what you meant. I even know what you meant. My point is that the choice of wording matters. Life is objective (in the sense of being mind-independent). Personhood is subjective (in the sense of being not mind-independent). Using the term 'life' frames the issue as one of objective observation, when really it isn't. Framing of the issue matters. It shapes presumptions and expectations, which in turn shape perception, reasoning, and conclusion. Word choice matters.
@00StarryKnight00
@00StarryKnight00 11 жыл бұрын
You should do a video about how people can dream of an event, and later have that event in your dream actually occur in real life.
@wei495
@wei495 11 жыл бұрын
What's interesting is transdifferentiation: when those "tags" are changed into others, causing a differentiated somatic cell to change into another.
@CIRMTV
@CIRMTV 11 жыл бұрын
Bravo to SciShow for devoting an episode to stem cells! There are a few inaccuracies in the show. At 1:55 - transplanting pluripotent cells into tissues could likely cause tumors. Instead, the therapy strategy would involve 1st growing the pluripotent cells into liver cells in a lab and THEN transplanting. Or find drugs that could activate liver stem cells already living in the tissue. At 3:09 - over 200 stem cell lines are available actually. Google "NIH Human Embryonic Stem Cell Registry"
@Alitari
@Alitari 11 жыл бұрын
My conversation with 23ajbulls has been very considerate on both sides; you should take notes. They've pointed out their position, I've pointed out mine, they've poked at my arguments, I've poked at theirs. We're unlikely to come to a compromise but at least we'll feel good that we've been able to air our positions in a rational, calm manner, without the need of going to school yard tactics of swearing and calling people names. It's been a good conversation from both sides, I believe.
@cameronmacdonald8394
@cameronmacdonald8394 11 жыл бұрын
Think of the college/trade school comparison he made. A stem cell can be like a little kid, pretty much able to learn anything you teach them because it's easier to learn when you're young, or like an older person, who has trouble learning because their memory isn't so great. Adult stem cells can't develop into as many things as embryonic stem cells can in the same way that older people have a tougher time learning things compared to kids. Did that help?
@kayvee256
@kayvee256 11 жыл бұрын
Choice of phrase in this context is important and revealing. 'Life begins at conception' is wrong - but easier to swallow if you don't think about it. 'Personhood begins at conception' is a larger claim. It asks us to think about what makes a person a person. This is not as trivial a concept as many people like to pretend it is. In my view, personhood is the recognition of an organism with properties such as the capacity to suffer, reflect, decide, emote, etc.
@CaptainAricDeron
@CaptainAricDeron 11 жыл бұрын
I concur. In fact, the only thing I have to add is that I hate it when people just assume that I'm ignorant or less intellectual because of a certain belief or set of beliefs I have, so I do my best not to do the same to others. It's the Golden Rule and in my mind it's just common courtesy.
@maggiequick7473
@maggiequick7473 8 жыл бұрын
thank god for hank green
@ajkorras
@ajkorras 8 жыл бұрын
+Maggie Quick I agree. I just came from a horrible lecture where this "omnipotent" lawyer lecturer was talking about these pluripotents and multipluripotents and it just went totally over everyone's head
@jcfreak73
@jcfreak73 11 жыл бұрын
Way to carefully avoid the controversies Hank. Excellent job.
@sorwoggpm
@sorwoggpm 11 жыл бұрын
It doesn't make the elderly person less human, it makes them have less to lose.
@Oathbreaker0
@Oathbreaker0 11 жыл бұрын
Don't want to interrupt the interesting debate on the definition on life and the ethics that come with it, but recent studies (for which a nobel prize was awarded this year) showed that fibroblasts (part of the connective tissue) can be dedifferentiated into pluripotent stem cells by making use of just 4 transcription factors (Myc, Oct3/4,Sox2 and Klf4). This has, as far as i know, only been done with mice fibroblast but has great potency and will eliminate the need for fertilized eggs :)
@anugrahagnihotri4645
@anugrahagnihotri4645 Жыл бұрын
hey Hank , how do you achieve such deep understanding of topics?
@mayurp23
@mayurp23 11 жыл бұрын
This video is saving me from my presentation. Thank you scishow
@Alitari
@Alitari 11 жыл бұрын
First off, just something to be aware and careful of: many 'why' questions are poorly phrased 'how' or 'what' questions. The reason that stem cells can become any other type of cell is due to the need for all these different kinds of cells but starting from a position where you don't already have them. The method by which stem cells become those different cells is called differentiation. Essentially chemical signals tell the stem cell what kind of cell it should turn into.
@johndeering708
@johndeering708 8 жыл бұрын
Induced pluripotent stem cells are an even greater innovation
@bloodyrose2076
@bloodyrose2076 8 жыл бұрын
That is a risk, the other issue is the fact, just like the adult stem cells, induced or not, they will not reproduce as fast as an embryonic stem cell. Although this does allow scientists to continue stem cell research without being hindered by the ethics and morality police.
@bladewind21
@bladewind21 11 жыл бұрын
I'm so proud of you hank
@Alitari
@Alitari 11 жыл бұрын
I said, if you would be kind enough to read it again, 'for instance'. That implies that it is a reason, but not the sole reason. For instance (again to be clear for you, this is just another example or reason), a caregiver might enjoy giving care to someone who cannot care for themselves ... it gives their life meaning and direction that a cluster of cells could not, because you cannot, as you yourself have pointed out, notice that it is even there.
@DRJIMTVTV
@DRJIMTVTV 9 жыл бұрын
Please remember that many of the physicians using stem cells for things like discogenic pain are mainly using adult stem cells derived from adipose tissue or bone marrow.
@lightlittlebrownboy
@lightlittlebrownboy 11 жыл бұрын
Theirs always some argument on Hank's videos. Every single one. Some kind of argument.
@singingscientist
@singingscientist 11 жыл бұрын
I just checked out the link in the sources to the NIH article and yes, I think you said it backwards...adult stem cells are thought to have a lower likelyhood of tissue rejection compared to embryonic stem cells. That is a pretty important difference that you should probably correct.
@Alitari
@Alitari 11 жыл бұрын
Did you check the 'Show more' section? He has a Google document that has the references.
@kayvee256
@kayvee256 11 жыл бұрын
"That is the important thing to consider; that life develops in stages." Yes, of course. Where we differ is that you think that the organism is a person from the moment of conception. I, on the other hand, think that personhood should only be recognized in the later stages. This is partly why I don't like the framing of the issue as 'life begins at conception'. That framing assumes that personhood and being alive are the same thing - which is the very matter under contention.
@dadeskr
@dadeskr 11 жыл бұрын
It's got something to do with chemical signals being produced elsewhere in the body which activate specific genes and so changes the cells morphology. It's a complicated process and I don't remember it that well, it also seems that cells know where they are just depending on the structures around them.
@wildhooves10
@wildhooves10 11 жыл бұрын
I have a SciShow question - we hear of ancient ruins that are found underground, and get dug up - where does all the dirt on them come from? Why do they wind up being buried?
@WheresMyMailbox
@WheresMyMailbox 8 жыл бұрын
Thanks, I was really confused in class and this helped.
@Jedi3231
@Jedi3231 11 жыл бұрын
Funny. Right before Hank was going to use a college student as an analogy, I actually thought to myself, " Huh. Kinda like college students. " I felt pretty cool once he actually used it.
@jackhong5035
@jackhong5035 11 жыл бұрын
Teratomas!! You can't talk about stem cells without mentioning teratomas! They are so cool. (Well, actually they're pretty gross, but interesting to learn about I guess). Anyway, I would love to see a video about them. Please.
@gammadude88
@gammadude88 11 жыл бұрын
You know what? Thank you. You're absolutely allowed to believe what you want to. I'm an atheist personally, but I'm not the jerk who's going to say that everybody is wrong because I said so. (not saying that either creationists, atheists or anybody is known specifically to do that) I think that it shouldn't be a war between beliefs; it should be an intellectual debate.
@Tymetwister
@Tymetwister 11 жыл бұрын
So when a cell is born then it's kind of like they are living the dream... "You can be... whatever you wanna be..."
@spaceics1805
@spaceics1805 3 жыл бұрын
pov ur here because ur teacher assigned this video for u to watch
@TheWulf899
@TheWulf899 11 жыл бұрын
Okay, that response /may/ have been a little hot-headed. Let me explain: Embryonic cells are great for research, however they can't be clinically used yet - Scientists still can't control when and what they turn into, and they usually end up with hair and teeth and skin growing on petri dishes. In contrast, Mesenchymal cells - other cells with much less pluripotency - are widely used in medicine today, and can be easily extracted from one tissue and placed into another without side effects.
@proudpinaygirl101
@proudpinaygirl101 5 жыл бұрын
tried to click on the link for the references and it just took me to a site for social media managing
@Alitari
@Alitari 11 жыл бұрын
As I mentioned in another reply, a tumour could also potentially become a person under the right conditions, but we don't have any issues with killing those 'clump of cells'. If we want to have a meaningful conversation using the language that is provided for various states of our development, it does get 'a lot more cold and sterile', which is not a bad thing. It means we all understand what each other are talking about. Smuggling in emotional content is not helpful.
@katsamuein
@katsamuein 11 жыл бұрын
we are arguing about whether human stem cells are human beings, and thus, whether it should be allowed to do stem cell research. quite relevant for the topic hank discussed.
@23ajbulls
@23ajbulls 11 жыл бұрын
Intermediate points do not fix the slippery slope; they are variables which allow for the slippery slope to continue. Intermediate points raise the question of why can't the point be placed earlier or later, causing a slippery slope that tilts one way or the other, and the proposed compromise satisfies very few people. People want it one way or the other, which is what makes finding compromise so difficult.
@SirKickz
@SirKickz 11 жыл бұрын
I understand what you were stating, and I was refuting it. Babies develop their self-sense around the beginning of the third trimester of a pregnancy, so yes, at birth, babies have self-sense. They also have it during the third trimester of a pregnancy. Their mental faculties certainly aren't at adult levels, yet, but they are there. So no, justifying killing a fetus because it doesn't have feelings or consciousness doesn't also justify killing a baby that has been born.
@Ploonperson
@Ploonperson 11 жыл бұрын
Its also worth mentioning that stem cells can be harvested from umbilical cords. This negates the need for any ethical issues or debate in terms of use of embryonic stem cells.
@CaptainAricDeron
@CaptainAricDeron 11 жыл бұрын
Can't speak for the people who down-voted this video, but I (being a creationist) didn't down-vote this video. Hank isn't saying that creationists are stupid for believing what we believe; he's just explaining what stem cells are, where they come from, etc.
@Alitari
@Alitari 11 жыл бұрын
In Roe vs. Wade they ruled that the fetus must be "potentially able to live outside the mother's womb, albeit with artificial aid. Viability is usually placed at about seven months (28 weeks) but may occur earlier, even at 24 weeks." As before, I disagree with the 'artificial aid' part. I believe the compromise was that if you don't know you're pregnant by the 28th week (7th month), you've had your chance to choose (on one hand) and the kid can survive by itself (on the other hand).
@sexoreligionpolitica
@sexoreligionpolitica 11 жыл бұрын
true words, it's one of those things that end up in that realm of subjective philosophical analysis, and like I tell my lecture groups, philosophy is an educated and complex verbal version of "you're it!".
@kayvee256
@kayvee256 11 жыл бұрын
Note that 'life begins at conception', as it is often simplistically stated, is incorrect. Sperm and ova can be distinguished as 'alive' or 'dead' - so our definition of life should be expanded to include them. In which case, life doesn't start at conception. Rather, there is an unbroken chain of living tissue between parents and their children. In my experience, what people typically MEAN when they say that phrase is that *personhood* begins at conception.
@kayvee256
@kayvee256 11 жыл бұрын
So at different times, we have at least three persons to consider: Person A (zygote A), person B (zygote B), and person C (the baby). The way you have explained the situation, it sounds as if person C's personhood begins at the point that person A and person B merge, but not at the point of either conception. Which is at the very least an amendment to your position that personhood begins at conception. The situation is not as simple as you're making it out to be. ^_^
@Ayokalyb
@Ayokalyb 11 жыл бұрын
5,000 likes and zero dislikes. An impressive feat no doubt.
@Alitari
@Alitari 11 жыл бұрын
I think the challenge with that argument would be the artificial fertilization one ... say we get to a point where we can properly 'culture' a fertilized egg to maturity outside of a woman, without the need of a womb attachment. At that point, the time is an important criteria (unless you expand your definition to include any suitable medium for the development of a fertilized egg, and then you're back to the moment of fertilization because we provide that medium now for in vitro fertilization)
@captaingreenbeardscove8304
@captaingreenbeardscove8304 5 жыл бұрын
Some people say embryonic stem cells not only grow into any tissue you want, some of them also go out of control and form cancer cells. Is that true?
@Frankly-_
@Frankly-_ 10 жыл бұрын
These stem cells could potentially form spinal cells and paraplegics and quadriplegics their ability to walk and move their arms again.
@6768hahaha70
@6768hahaha70 11 жыл бұрын
Ha! I finally learned nothing from a scishow video. First time for everything.
@katsamuein
@katsamuein 11 жыл бұрын
no problem, as long as i remember. and i do. nice to see others do too, though ;)
@RworldKM
@RworldKM 11 жыл бұрын
Recently, a burger patty was made from beef meat that's completely produced artificially from Stem cells. It was under the pretext that successful mass-production will reduce food shortages and the volunteers who ate the burger said it tasted like cake. Yeah...I'll just let that sink in for a while....
@TheWulf899
@TheWulf899 11 жыл бұрын
Only with a huge amount of research though; In Australia, Japan - heck, everywhere in the world - people have been trying to control ESCs (Embryonic Stem Cells) for years. But yes, with the aid of the US, we may well get the backing (as a scientific community) to get /that/ much closer to fixing the problem. And then there's iPS cells (normal cells turned back /into/ stem cells synthetically), however those have only been just made and are still in development.
@Legomyegoorj
@Legomyegoorj 11 жыл бұрын
Different states (or stages) of being =/= different types of beings. It is true that a teenager is not in the same state of being (or developmental stage) as a adult, yet no one thinks that the teenager is less human than the adult--or, at least, we should hope no one does. It's no less arbitrary to say that birth is the point at which the organism in question becomes human, than to choose puberty.
@kayvee256
@kayvee256 11 жыл бұрын
When I say objective, I mean the moon, a chair. Things that continue to exist in the absence of any mind. When I say subjective, I mean things that would not continue to exist in the absence of any mind. Values, for example. What we mean by 'exists' is changes depending on context. Existence of pain is subjective - existence of the moon is objective. Both exist, but not in same way. To say something is subjective is not to say it does not exist or is unmeaningful. Meaning is subjective too.
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