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DeCS
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Descriptor English:
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Yolk Sac
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Descriptor Spanish:
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Saco Vitelino
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Descriptor Portuguese:
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Saco Vitelino
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Synonyms English:
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Embryo Vitelline Sac
Embryo Vitelline Sacs
Sac, Yolk
Sacs, Yolk
Vitelline Sac of Embryo
Yolk Sacs
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Tree Number:
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A10.615.284.981
A16.254.750.981
A16.331.800
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Definition English:
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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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History Note English:
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78; was see VITELLINE MEMBRANE 1973-77
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Allowable Qualifiers English:
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Record Number:
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15413
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Unique Identifier:
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D015017
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Occurrence in VHL:
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Similar:
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DeCS
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