Preferred Label : placenta;
Uberon definition : organ of metabolic interchange between fetus and mother, partly of embryonic origin
and partly of maternal origin[GO]. The fetal portion of the placenta is known as the
villous chorion. The maternal portion is known as the decidua basalis. The two portions
are held together by anchoring villi that are anchored to the decidua basalis by the
cytotrophoblastic shell.;
Uberon synonym : allantoic placenta; eutherian placenta;
Uberon Homology note : Phylogenetic analyses of the concatenated data set using maximum parsimony, maximum
likelihood and distance based (neighbour joining) methods all converged on a nearly
identical, well supported topology defining four principal eutherian lineages. The
results affirm monophyly of traditional placental orders (except Artiodactyla and
Insectivora), and also support some previously proposed, as well as new, superordinal
clades.[well established][VHOG];
Uberon Taxon note : Eutherians: In eutherians, the chorioallantoic membrane of the fetus establishes intimate
contact with the adjacent vascular wall of the mother's uterus to produce the placenta,
a composite structure formed in part from tissues of the fetus and in part from tissues
of the mother [ISBN:0073040584 (Vertebrates, Kardong)]. TODO - is taxon restriction
too strict, even if we restrict def to allantoic placenta? - WP says: also found in
some snakes and lizards with varying levels of development up to mammalian levels.
Pough et al. 1992. Herpetology: Third Edition. Pearson Prentice Hall:Pearson Education,
Inc., 2002. // See also: DOI:10.1002/jmor.11011;
Origin ID : 0001987;
UMLS CUI : C0032043;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- develops from
- has part
- part of
organ of metabolic interchange between fetus and mother, partly of embryonic origin
and partly of maternal origin[GO]. The fetal portion of the placenta is known as the
villous chorion. The maternal portion is known as the decidua basalis. The two portions
are held together by anchoring villi that are anchored to the decidua basalis by the
cytotrophoblastic shell.
