Yolk Sac, Chorion, Placenta Confusion! - USMLE Forums
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Old 04-08-2012
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Zygote Yolk Sac, Chorion, Placenta Confusion!

What exactly is a chorion? what's a placenta?

the umbilical vessels connect the fetus to the yolk sac? is the yolk sac the placenta?
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Old 04-09-2012
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bumpity bump-bump.
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Old 04-09-2012
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watch this video.. I'm sure it'd help

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Old 04-09-2012
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bahh 1 hour and 3min!?
crap, was hoping for a quick answer lol
thanks though
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Old 04-09-2012
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That's 1 hr of everything you need to know in embryology. You don't have to watch the whole video. Just play the part you got a problem with
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Old 04-10-2012
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Default This is how I remember

Chorion(outer layer layer of trophoblast) with decidua(endometrium ) >>> placenta


Part of Yolk sac is internalized by embryo and becomes lined by endoderm to form primitive gut and rest of yolk sac by vitellointestinal duct .. Eventually VI duct n remnants of yolk sac become a part of umbilical cord.
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Old 04-10-2012
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Quote:
Originally Posted by Dr.NickRiviera View Post
bahh 1 hour and 3min!?
crap, was hoping for a quick answer lol
thanks though
watch 18 to 25 min video
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Old 04-10-2012
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Quote:
Originally Posted by callmerocky2 View Post
watch this video.. I'm sure it'd help

Thanks a million for the video. It was quite helpful.
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