NLM Logo

Yolk Sac MeSH Descriptor Data 2023


MeSH Heading
Yolk Sac
Tree Number(s)
A10.615.284.981
A16.254.750.981
A16.331.800
Unique ID
D015017
RDF Unique Identifier
http://id.nlm.nih.gov/mesh/D015017
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.
Entry Term(s)
Vitelline Sac of Embryo
Previous Indexing
Chick Embryo (1966-1972)
Fetal Membranes (1966-1972)
Vitelline Membrane (1966-1974)
Public MeSH Note
78; was see VITELLINE MEMBRANE 1973-77
Online Note
search VITELLINE MEMBRANE 1973-77
History Note
78; was see VITELLINE MEMBRANE 1973-77
Date Established
1978/01/01
Date of Entry
1977/05/13
Revision Date
2007/07/11
Yolk Sac Preferred
page delivered in 0.159s