"Why do humans have a third eyelid?" Me: we have a third eyelid?

I vote we bring it back please. I’m sick of getting my favorite winter wool sweater fiber stuck in my eye.

Now due to high levels of pollution and sooty particles in the air, we might want to get our third eyelid back!

I REALLY didn’t like when the tail got sucked in

“The tail bone doesn’t hurt us” Have you fallen on that thing before?

"Why do humans have a third eyelid" I swear I thought for a second those "third eye" awakening videos with the crazy people were real for a second holy-

We bigfoots have a lot of questions about humans, mainly like why do they camp in the woods and bother us

*Now everyone is touching their thumbs with the pinkies*

4:09- Ah yes, the next stage of evolution for humans is a giant floating emote. How delightful.

4:05 In the end we all become Emojies.

Your voice is so soothing my third eyelid relaxed.

Why did we get rid of the third eyelid though? (The functioning part at least) it seems pretty useful in any circumstance

Actually, the M. palmaris longus (and I guess the M. plantaris too for that matter) is really nice to have _because_ it’s basically useless. In case of serious injury to muscles and/or tendons you can remove them and use them as auto-transplants to repair more important muscles without sacrificing tendons which have a far bigger function

ممكن كل شخص غير ناطق بالعربية يستغرب من هذا التعليق لكن هذي طريقتي الوحيدة عشان اشكر الي ترجم الفيديو للعربية لأنه يقدم فائدة كبيرة جدا للمتابع العربي ، منها انه يتعلم english عن طريق الاستماع للكلمات وترجمتها وأيضا الاستفادة من محتوى الفيديو ، فشكرا شكرا شكرا لكل شخص ترجم اي مقطع ، اجركم عند الله بإذن الله

Silly mortals, I have 16 eyelids

This video : 5% about third eyelid 95% about other vestigial organs Title : why do humans have a third eyelid?

I accidentally read the title as 'why do humans have a third *eye* '

'The tendon in your hand helped you swing from branch to branch.' Now I know why I'm so good at climbing 😎😎

I learn something new everyday I didn't even know we have a third eyelid thanks Ted

Video title: *exists* Me: A *WHAT*

What have you learned from this video? 0:50 *giraffes are heartless creatures*

With this video I learned that the human being had several evolutions until he reached what he is today, that we have a third eyelid that basically is useless for just other animals and that the appendix is something that has always been with us. This video was very interesting in my opinion because it leaves us thinking about our evolution.

"Humans are the result of trials, *errors* ..." Shows teenager chatting

"The tailbone doesn't hurt us." Have you ever heard of sit ups?

1:56 this was extremely unsettling

Funny story: His voice is so soothing that I literally drooled...

Having a tail would have been so cool.

TedEd: Third eye- Me: Oh really TedEd: -Lid

me: seeing ‘why do humans have a third eyelid’ me: not realizing it’s the pink thing in our eyes me: *we have a what now*

Ted Ed: Why do we have a third eyelid? Video: literally nothing about eyes

Ted: Why do we have a third eyelid? *Clicks* Also Ted: Tails!

"Why do humans have a third eyelid?" We... we do?

Imagine trying to sleep with a third eyelid for example, having to slowly close it like animals when they sleep and then closing your second eyelid

Me: we have a second eyelid?

I have a that band things on my wrists, I guess my ancestors weren't the type to follow trends like walking on land.

The appendix discussion is so outdated. We *know* that the appendix is a bacterial reservoir. But it's not to help digest food. It's to restore your microbiome. If your microbiome is disturbed, such as during diarrhea, the appendix is the organ that restores your microbiome if you survive the diarrhea (since those were a bit dangerous in ancient times). And since we're learning more and more how important our microbiome is, it then becomes evident how useful the appendix is. Of course, if it's causing problems, surgically removing the appendix is the right move. We've also discovered that people lacking an appendix tend to have a higher rate of infection (way more dangerous in ancient times). The appendix doesn't serve a visible function, but it's still pretty important. Also, if it was actually useless, then it'd make literally zero evolutionary sense why it evolved multiple separate times across many animals. No matter how random evolution is, a trait evolving separately multiple times is quite indicative that that trait serves an important function. Also the tail theory sounds almost as iffy. Almost all apes live in forested areas. Humans are basically the exception. Also, monkeys move around on the ground just fine even with their tails. This whole video in general just sounds pretty outdated.

I remember my grandpa being able to move his third eyelid and I'm like how do you do that?

Such blissful animation work!

As a guy living in a dusty place with fast winds, I want my third eyelid back!

I would have loved more information about the third eyelid. Like how it works, if our eyelid made it redundant, how life would be if we still had it. Felt a bit disappointing to only hear like three sentences to what was in the description

This is not about why we have the 3rd eyelid, but it was useful.

I lost my appendix. And since, I had stomach problems very often. I absolutely think that the appendix has some function of storing enzymes or something that helps digestion. Anybody else that can confirm the loss of it started digestion problems? Anybody that can dismiss it, that although missing the appendix you can eat anything without a problem?

Camels over there saying "I swear our species are related!!"

I thought that this video was about the third eye of Shiva , But still I learned something.

On days when I need to walk to the bus stop in the winter I always want a third wind proof eye lid, only to realize we have them and not be able to EVEN USE THEM!

TedEd: Why do humans have a third eye lid? Me: We have a third eye lid? o.O

ugh. the third eyelid would be really useful for me.

Great video Ted Ed! Lovely as always!

I found out that this information is incorrect. The small pink thing is actually:The lacrimal caruncle is the small, pink, globular spot at the inner corner, or the medial canthus, of the eye. It contains both oil and sweat glands. The whitish material that sometimes accumulates in that region is from these glands. The tarsal plate is composed of connective tissue that gives support to the eyelids. I got this information from safari. My science teacher who was once a college professor told me that the lacrimal caruncle is actually part of the tear glands.

the appendix serves two purposes: it aids in the immune system similar to the tonsils. its also a reservoir for your gut biome, say you get food poisoning, your body flushes everything out and this cripples your current gut biome, luckly if you have your appendix, a batch of your micro biome survived inside it and will restore everything to normal.

When I hurt my eyes, the "third eye-lid" slowly covered that part of the conjunctiva until it healed itself. *I don't think it's a vestigial organ.* -- The vermiform appendix, which was long believed to be a vestigial organ, has recently been found to be the part that houses the useful bacteria which helps in digestion. *I don't think any organ in our body is useless, no matter if it has been scientifically proved or not.*

Oh, I just realized that I couldn't pay attention to the video because I was so busy paying attention to that adorable animation

The thing that makes me think a lot is that with recent medical breakthroughs and advancements, it kind of disrupts natural selection in humans, because now that there's a problem, boom we just fix it physically, but our DNA still contains that problem, so it just keeps passing it on through our offspring unless a mutation occurs. Like, sometimes I think that medical advancements are bad because diseases and illnesses that could have killed millions helped with natural selection and now that they are gone or have treatments, those diseases/illnesses may never go away. Idk if I make sense though.

am I the only one who couldn't stop blinking during this?

I told my sister this, and she proceeded to poke my eye out to see if I was lying or not.

0:52 "Giraffes are heartless creatures."

Zuck's Third eye lid probably works.

TED ED: mentions third eyelid ME: Come again for Big Fudge?

The thumbnail is Mike Wazowski with two eyes

*Kindness* is a language that a deaf can hear and a blind can see

So, after googling and reflecting on my own knowledge of my anatomy, we only have the reminant of the third eyelid and not the actual lid (or membrane called the nictitating membrane). So to answer my own questions, no we can't manually close the lid since it's basically nonexistent, and if we did have it the membrane would have been translucent which would be dope.

1:55 that noise is thoroughly unsettling

The appendix plays an important role in immune function, SciShow released an interesting video on the topic fairly recently.

When I woke up, I read this as, Why do humans have a third eye? And I was like whaaaaaaaaaaaaaaaa?????????

The animation is simple yet engaging

So mindblowing. Makes you realise how your lifetime isn't even a speck on the timeline of the history of the universe. Even the past 2000 years is nothing.

Avi Ofer is such an amazing animator!!!!

The title is about the third eyelid. What's left in my head : an appendix

Third eyelid: **blinks** Me: **uncomfortable screeching**

Me: that was neat Video: Up next: ANIMAL BALLS

TELL ME WHO ELSE TOUCHED THEIR PINKIE TO THUMB LIKE ME.

Next time I see someone raving "evolution isn't real" I'll just point to their third eyelid

The title is misleading. The topic is interesting but I expect more from this channel.

Fun fact to remnants: Due to our evolution from fish and their anatomy, the nerve that supplies the lanrynx starts in your brain, goes down to the heart, underneath the aorta and then back up to the larynx. That’s not a big deal in humans, aside from some surgical procedures, but it also does that in GIRAFFES. With the length of their throats, information from and to the larynx delay about quarter to half a second due to this. Bring that up in case anyone talks to you about „intelligent design“

I kind of wish that we still had a third eyelid.

I have a vestigial muscle in my left arm, but not my right

The title: why third eyelid The video: the whole history of human mutation over the years super oversimplified

POV: You’re trying to use your 3rd eyelid even though it won’t work

The art style in this video is so cute and I love the topic, such a fun video❤️

The title doesnt make sense it really should be called vestigial characteristics

Title: why do we have a third eyelid? Video: answers it within seconds, rest of video talks about vestigial traits for the remaining 4 minutes.

Fascinating video! Good on you!

Explaining about the third eye Goes straight to human history evolution

I have that extra tendon in my wrist!!!

"if it ain't broke, don't fix it" -Evolution

Why is it basically deleted tho? Seems like an awesome and useful trait to have during dusty summers or rainy days.

When will the next *THINK LIKE A CODER* episode be released ⁉️ I am waiting for it😐😐 And I don't have that 'Palmaris Longus'😁

해를 끼치지 않는다면 필요없는몸의 부위가 남을 가능성이 있다는것을 배웠습니다. 재미있고 유익한 시간이 되었습니다. 감사합니다. 언제나 응원합니다.

So you're telling me that I could've had a built in underwater goggles but my ancestors didn't randomly submerge their faces in puddles like I do, so now it's gone?

Video: for humans, it doesn't work... Me nevertheless: *tries to blink with third eye lid*

I didn’t even know there was a second eye lid

my biology teacher in high school told me that the appendix hadn't completely evolved out of us because it supported the immune system and lymphatic system somehow. is that just one of those "we can't find another reason for this thing to not disappear" reasons? (also, wisdom teeth are weird and I'm surprised you didn't mention them in the video)

The appendix is super important though. It's a warehouse for good bacteria. It aids our immune system.

Man.. I thought that third eyelid was the thing that made you shed tears

finally something i know about and can comprehend. thanks biology!

I don't even have a double eyelid. - Asian

I'm pretty sure any ted educational video response to any question would be because of our ancestors and some evolutions related answer.

The third eye lid is the lacrimal caruncle is the small, pink, globular spot at the inner corner, or the medial canthus, of the eye. It contains both oil and sweat glands. The whitish material that sometimes accumulates in that region is from these glands. ... Together, these muscles are capable of moving the eye in almost any direction.

The third eyelid doesn't work cause we already invented glasses. Or the Life Developer forgot to update life.

Nobody: Nobody: Nobody: Everybody: *_Touches pinkies and thumbs together_*