organ 器官 placenta 胎盘 BTO:0001078 CALOHA:TS-0799 EFO:0001407 EMAPA:35689 EV:0100119 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 [ISBN10:0073040584 (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: http://dx.doi.org/10.1002/jmor.11011 FMA:63934 GAID:379 MA:0000386 MAT:0000279 MESH:A16.759 MIAA:0000279 Marsupials possess only a rudimentary placenta, with reduced nutrient and oxygen exchanging capabilities. OpenCyc:Mx4rvv4zZ5wpEbGdrcN5Y29ycA 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:0001987 UMLS:C0032043 VHOG:0001266 allantoic placenta eutherian placenta 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. placental uberon 使用最大简约、最大似然和基于距离的(相邻连接)方法进行系统发生分析级联数据集的都收敛于几乎相同的、定义四个主真兽亚纲动物谱系的良好支持拓扑。结果证实了传统胎盘次序(除偶蹄目和昆虫目外)的单系性,也支持了以前提出的一些新的、上位性的无性系。[well established][VHOG] 尿囊胎盘 有袋类动物只有一个基本的胎盘，其营养和氧气交换能力较低。 真兽亚纲动物:在真兽亚纲动物中，胎儿的绒毛尿囊膜与母亲子宫的邻近血管壁建立紧密接触以产生胎盘，部分由胎儿组织和部分由母亲组织形成的复合结构。待办事项 - 是分类单元限制太严格了吗，即使我们把def限制在尿囊性胎盘里？- WP 说明: 也发现在一些蛇和蜥蜴有不同的发展水平，乃至哺乳动物的水平。Pough et al. 1992. Herpetology: Third Edition. Pearson Prentice Hall:Pearson Education, Inc., 2002. // See also: http://dx.doi.org/10.1002/jmor.11011 真兽类胎盘 胎儿和母亲之间的代谢交换器官，部分是胚胎来源，部分是母源[GO]。胎盘的胎儿部分被称为绒毛绒毛膜。母体部分被称为蜕膜基底。这两个部分通过锚定由细胞滋养层壳钴固定在蜕膜基底上的绒毛保持在一起。 胎盘 mesoderm-derived structure 中胚层衍生结构 reproductive structure 生殖结构 organ 器官