The development of the liver and gall bladder explained in less than 10 minutes.
If you are completely new to embryology and you want to understand it quickly, this should be the first video you watch:
- • Introduction to Embryo...
Post any questions you have about the video below, I read all the comments:
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Summary for your notes:
- liver appears week 3 as an outgrowth of endoderm (epithelium of the GIT) at the distal end of the foregut
- liver bud = hepatic diverticulum
- rapidly grows/proliferates into the spetum transversum (mesoderm)
- bile duct forms from the connection of the liver to the duodenum
- gallbladder and cystic duct grow from the bile duct
- epithelial liver cords mingle with the vitelline and umbilical veins and form hepatic sinusoids
- liver cords become liver cells and form lining of biliary ducts
- septum transversum forms the haematopoietic cells, Kupffer cells, and connective tissue cells
- lesser omentum and falciform ligament are derived from ventral mesentery
- all of the liver is covered in peritoneum except the area in contact with the diaphragm (bare area)
Abnormalities:
- accessory hepatic duct
- duplication of the gallbladder
- extrahepatic biliary atresia
- infraheptic biliary duct atresia and hypoplasia