Folding Flashcards
Why is the ailmentary tube intiially ;closed’ at its ends and how does it open up?
They are intially closed to help development and it means no tissue gets into the embryo while in development. The buccopharyngeal and cloacal membrane eventually disappear to reveal the ailmentary tube.
What are the major consequences of embryonic folding?
Transforms into a 3D structure due to differential growth which will give embryo all the features of an adult vertebra.
How is coelomic cavity formed?
(D)By simultaneously longitudinally and transversely and the yolk sac is
pushed down until only a tube links the sac from the rest of the embryo.
The tube incorporates into the lining of the digestive tract and a small
opening connects the inside of the gut to the yolk sac
