Gas exchange in the embryo

Started by polarmolar
This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.
Get help with your application

Use all the free resources available to you from SDN: articles, guides, expert advising, forums discussions, and school research.

Browse articles Compare schools My application plan Read Interview Feedback
Practice for interviews Ask an Advisor
Sort by date Sort by votes
gas exchange is allantois, and I can't remember this straight. food is thru?the liquid around the embryo to support is amnionor the choiron.. what is the function of yolk sac?
 
Upvote 0 Downvote
Advertisement - Members don't see this ad
i saw somewhere in kaplan ( i think) that the chorion takes part in gas exchange? or is it only for reptiles?
ooh never mind just found this fact
In birds and reptiles, the membrane adheres to the shell and is highly vascularized to serve in gas exchange. In mammals, it forms the fetal contribution to the placenta, made by trophoblastic tissue and extraembryonic mesoderm, containing blood vessels that allow exchange of materials with maternal circulation.
 
Upvote 0 Downvote
tranv117 said:
placenta, for blood and gas exchange in the fetus.
Click to expand...

Oh..MG...I completely forgot about other species! I just was thinking about human fetus! So it's allantois for sure. I remember it clearly from kaplan notes, since I just had my Coffee.😀
Also it depends on how the question is worded, because B/W chorion and allantois might get alittle confusing for some people. Not for me, I know there are other species besides us!😉

Allantois: Responsible for respiration and excretion
Chorion: The most membrane that Permits the gas exchange.
Amnion: protection against shock
Yolk sac: Food
 
Upvote 0 Downvote
Isradoc1983 said:
i saw somewhere in kaplan ( i think) that the chorion takes part in gas exchange? or is it only for reptiles?
ooh never mind just found this fact
In birds and reptiles, the membrane adheres to the shell and is highly vascularized to serve in gas exchange. In mammals, it forms the fetal contribution to the placenta, made by trophoblastic tissue and extraembryonic mesoderm, containing blood vessels that allow exchange of materials with maternal circulation.
Click to expand...
I am really confused, I am two days away from my Dat exam and I am doing a question that says: In reptiles and birds, which membrane has the function of gas exchange? the answer is the Chorion but the allantois is one of the options in the answer choices. Can someone tell me if this answer is actually correct, also in mammals how would the answer changed? Thanks beforehand.
 
Upvote 0 Downvote
You must log in or register to reply here.