loading...| Preferred Name |
placenta |
| Synonyms |
allantoic placenta eutherian placenta |
| Definitions |
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. Marsupials possess only a rudimentary yolk-type placenta, with reduced nutrient and oxygen exchanging capabilities. |
| ID |
http://purl.obolibrary.org/obo/UBERON_0001987 |
| comment |
Marsupials possess only a rudimentary yolk-type placenta, with reduced nutrient and oxygen exchanging capabilities. |
| database_cross_reference |
MIAA:0000279 EFO:0001407 VHOG:0001266 MAT:0000279 EMAPA:35689 OpenCyc:Mx4rvv4zZ5wpEbGdrcN5Y29ycA CALOHA:TS-0799 Wikipedia:Placenta SCTID:181455002 GAID:379 NCIT:C13272 UMLS:C0032043 MESH:A16.759 EV:0100119 FMA:63934 MA:0000386 BTO:0001078 |
| 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. |
| depicted by |
http://upload.wikimedia.org/wikipedia/commons/6/66/Placenta.jpg http://upload.wikimedia.org/wikipedia/commons/f/f1/Placenta.svg |
| develops_from |
http://purl.obolibrary.org/obo/UBERON_0004340 |
| has_exact_synonym |
allantoic placenta eutherian placenta |
| has_obo_namespace |
uberon |
| id |
UBERON:0001987 |
| in_subset |
http://purl.obolibrary.org/obo/uberon/core#uberon_slim http://purl.obolibrary.org/obo/uberon/core#organ_slim |
| label |
placenta |
| notation |
UBERON:0001987 |
| only_in_taxon | |
| part_of | |
| prefLabel |
placenta |
| treeView |
http://purl.obolibrary.org/obo/UBERON_0000474 http://purl.obolibrary.org/obo/UBERON_0004340 http://purl.obolibrary.org/obo/UBERON_0016887 |
| UBPROP_0000003 |
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] |
| UBPROP_0000007 |
placental |
| UBPROP_0000008 |
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 |
| subClassOf |
http://purl.obolibrary.org/obo/UBERON_0005156 |