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Yolk sac

yolk sac

(Science: embryology, ornithology) One of the set of extra embryonic membranes, growing out from the gut over the yolk surface, in birds formed from the splanchnopleure, an outer layer of splanchnic mesoderm and an inner layer of endoderm.


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Humans are Deuterostomes. Right?..

... Besides, that primitive groove is somehow connected to the yolk-sac by means of blastopore (again, wiki says). So how did blastopore end up between yolk-sac ...

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by Siroggak
Tue Aug 12, 2014 4:46 pm
 
Forum: Human Biology
Topic: Humans are Deuterostomes. Right?..
Replies: 0
Views: 42

Stem Cells

... which makes an animal immune to a X pathogen, can both be injected into yolk sac or bone marrow. If the tumor developed and animal is protected against infection upon exposure ...

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by Shaanu
Thu May 09, 2013 3:00 pm
 
Forum: Molecular Biology
Topic: Stem Cells
Replies: 0
Views: 1271

Stem Cells

... which makes an animal immune to a X pathogen, can both be injected into yolk sac or bone marrow. If the tumor developed and animal is protected against infection upon exposure ...

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by Shaanu
Thu May 09, 2013 9:45 am
 
Forum: Genetics
Topic: Stem Cells
Replies: 4
Views: 4291

Extraembryonic Membranes

does anyone know exactly how the four membranes amnion yolk sac chorion, and allantois work to protect the embryo and egg?

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by vlc1500
Wed Mar 07, 2007 1:32 am
 
Forum: Zoology Discussion
Topic: Extraembryonic Membranes
Replies: 6
Views: 9166

Extraembryonic Membranes

... reptiles, birds, and mammals produce 4 extraembryonic membranes: amnion yolk sac chorion, and allantois With these four membranes, the developing embryo is able to carry ...

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by dipjyoti
Sun Feb 18, 2007 11:05 am
 
Forum: Zoology Discussion
Topic: Extraembryonic Membranes
Replies: 6
Views: 9166
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