part of part of in taxon develops from develops from Theria <mammals> Homo sapiens organ female reproductive system uterus placenta http://upload.wikimedia.org/wikipedia/commons/6/66/Placenta.jpg http://upload.wikimedia.org/wikipedia/commons/f/f1/Placenta.svg https://cdn.humanatlas.io/digital-objects/ref-organ/placenta-full-term-female/v1.1/assets/3d-vh-f-placenta-full-term.glb 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] allantoic placenta GAID:379 UMLS:C0032043 MIAA:0000279 MA:0000386 EMAPA:35689 eutherian placenta NCIT:C13272 EFO:0001407 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:0001987 SCTID:181455002 EV:0100119 MESH:D010920 Marsupials possess only a rudimentary yolk-type placenta, with reduced nutrient and oxygen exchanging capabilities. Wikipedia:Placenta BTO:0001078 MAT:0000279 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 FMA:63934 placental VHOG:0001266 CALOHA:TS-0799 chorion membrane allantois reproductive structure entire extraembryonic component