ONKI3 | Medical Subject Headings

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Hierarchy:	Medical Subject Headings (MeSH) ∟ Animal Structures ∟ Embryo, Nonmammalian ∟ Yolk Sac 7 coordinate concepts ∟ Chick Embryo \| ∟ Chorioallantoic Membrane \| ∟ Cleavage Stage, Ovum \| ∟ D004625Q000254* \| ∟ Allantois \| ∟ Amnion \| ∟ Chorion Medical Subject Headings (MeSH) ∟ Embryonic Structures ∟ Embryo ∟ Embryo, Nonmammalian ∟ Yolk Sac 7 coordinate concepts ∟ Chick Embryo \| ∟ Chorioallantoic Membrane \| ∟ Cleavage Stage, Ovum \| ∟ D004625Q000254* \| ∟ Allantois \| ∟ Amnion \| ∟ Chorion Medical Subject Headings (MeSH) ∟ Embryonic Structures ∟ Embryo ∟ Extraembryonic Membranes ∟ Yolk Sac 7 coordinate concepts ∟ Chick Embryo \| ∟ Chorioallantoic Membrane \| ∟ Cleavage Stage, Ovum \| ∟ D004625Q000254* \| ∟ Allantois \| ∟ Amnion \| ∟ Chorion Medical Subject Headings (MeSH) ∟ Tissues ∟ Membranes ∟ Extraembryonic Membranes ∟ Yolk Sac 7 coordinate concepts ∟ Chick Embryo \| ∟ Chorioallantoic Membrane \| ∟ Cleavage Stage, Ovum \| ∟ D004625Q000254* \| ∟ Allantois \| ∟ Amnion \| ∟ Chorion X
Broader terms:	Medical Subject Headings (MeSH) ∟ Animal Structures ∟ Embryo, Nonmammalian ∟ Yolk Sac Medical Subject Headings (MeSH) ∟ Embryonic Structures ∟ Embryo ∟ Embryo, Nonmammalian ∟ Yolk Sac Medical Subject Headings (MeSH) ∟ Embryonic Structures ∟ Embryo ∟ Extraembryonic Membranes ∟ Yolk Sac Medical Subject Headings (MeSH) ∟ Tissues ∟ Membranes ∟ Extraembryonic Membranes ∟ Yolk Sac Embryo, Nonmammalian > Animal Structures > Medical Subject Headings (MeSH) Embryo, Nonmammalian > Embryo > Embryonic Structures > Medical Subject Headings (MeSH) Extraembryonic Membranes > Embryo > Embryonic Structures > Medical Subject Headings (MeSH) Extraembryonic Membranes > Membranes > Tissues > Medical Subject Headings (MeSH) X
History note:	Chick Embryo (1966-1972) \| Fetal Membranes (1966-1972) \| Vitelline Membrane (1966-1974)X
historyNote*:	78; was see VITELLINE MEMBRANE 1973-77 X
onlineNote*:	search VITELLINE MEMBRANE 1973-77 X
publicMeSHNote*:	78; was see VITELLINE MEMBRANE 1973-77 X
Scope note:	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. X
activeMeSHYear*:	2006 \| 2007X
dateCreated*:	1977-05-13X
dateEstablished*:	1978-01-01X
dateRevised*:	2005-06-30X
recordAuthorizer*:	sjnX
recordMaintainer*:	lktX
recordOriginator*:	AEPX
Type:	Concept X
Coordinate terms:	Chick Embryo \| Chorioallantoic Membrane \| Cleavage Stage, Ovum \| D004625Q000254* \| Allantois \| Amnion \| Chorion X
URI:	X
Labels and equivalent concepts:	Ruskuaispussi (fi) Keltuaispussi (fi, replaced) Gulesäck (sv) Vitelline Sac of Embryo (en, replaced) Vesicula umbilicalis (la-FI, replaced) Saccus vitellinus (la-FI, replaced) X
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