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Yolk Sac

"Yolk Sac" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure, which enables searching at various levels of specificity.

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The first of four extra-embryonic membranes to form during EMBRYOGENESIS. In REPTILES and BIRDS, it arises from endoderm and mesoderm to incorporate the EGG YOLK into the DIGESTIVE TRACT for nourishing the embryo. In placental MAMMALS, its nutritional function is vestigial; however, it is the source of INTESTINAL MUCOSA; BLOOD CELLS; and GERM CELLS. It is sometimes called the vitelline sac, which should not be confused with the VITELLINE MEMBRANE of the egg.


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This graph shows the total number of publications written about "Yolk Sac" by people in UAMS Profiles by year, and whether "Yolk Sac" was a major or minor topic of these publications.
Bar chart showing 10 publications over 8 distinct years, with a maximum of 3 publications in 1997
To see the data from this visualization as text, click here.
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