uterus 子宫 An infundibulum, uterine tube, uterus, and vagina also differentiate along the oviducts of eutherian mammals.[well established][VHOG] BTO:0001424 CALOHA:TS-1102 EFO:0000975 EMAPA:29915 EV:0100113 FMA:17558 GAID:172 MA:0000389 MAT:0000127 MESH:D014599 MIAA:0000127 Most animals that lay eggs, such as birds and reptiles, have an oviduct instead of a uterus. In monotremes, mammals which lay eggs and include the platypus, either the term uterus or oviduct is used to describe the same organ, but the egg does not develop a placenta within the mother and thus does not receive further nourishment after formation and fertilization. Marsupials have two uteruses, each of which connect to a lateral vagina and which both use a third, middle 'vagina' which functions as the birth canal. Marsupial embryos form a choriovitelline 'placenta' (which can be thought of as something between a monotreme egg and a 'true' placenta), in which the egg's yolk sac supplies a large part of the embryo's nutrition but also attaches to the uterine wall and takes nutrients from the mother's bloodstream. OpenCyc:Mx4rvViojJwpEbGdrcN5Y29ycA The hollow muscular organ in female mammals in which the blastocyst normally becomes embedded and in which the developing embryo and fetus is nourished. Its cavity opens into the vagina below and into a uterine tube on either side. [TFD][VHOG] Two uteruses usually form initially in a female fetus, and in placental mammals they may partially or completely fuse into a single uterus depending on the species. In many species with two uteruses, only one is functional. Humans and other higher primates such as chimpanzees, along with horses, usually have a single completely fused uterus, although in some individuals the uteruses may not have completely fused [Wikipedia:Uterus] UBERON:0000995 UMLS:C0042149 VHOG:0001137 galen:Uterus the female muscular organ of gestation in which the developing embryo or fetus is nourished until birth uberon uterine 两个子宫通常最初在雌性胎儿中形成，而在胎盘哺乳动物中，根据物种的不同，它们可能部分或完全融合到单个子宫中。在许多有两个子宫的物种中，其中只有一个有功能。人类和其他高级灵长类动物，如黑猩猩，以及马，通常只有一个完全融合的子宫，尽管在一些个体中子宫可能没有完全融合 [Wikipedia:子宫] 大多数产卵的动物，如鸟类和爬行动物，都有输卵管而不是子宫。在单孔哺乳动物中，产卵的哺乳动物包括鸭嘴兽，用术语子宫或输卵管来描述同一器官，但卵在母亲体内不发育成胎盘，因此在形成和受精后不进一步获得营养。有袋动物有两个子宫,每个子宫都与侧阴道相连,并且都使用第三个,中间的阴道,起着产道的作用。有袋胚胎形成绒毛膜卵细胞'胎盘'(这可以被认为是介于单孔类动物蛋和'真'胎盘之间的事物),其中蛋的卵黄囊提供胚胎大部分的营养，而且还附着在子宫壁上，从母亲的血液中获取营养。 子宫的 孕育妊娠期发育中的胚胎或胎儿直至分娩的雌性肌肉器官 漏斗、输卵管、子宫和阴道也可沿卵巢哺乳动物的输卵管分化。[well established][VHOG] 雌性哺乳动物的中空肌肉器官，囊胚通常嵌在其中，发育中的胚胎和胎儿在其中被滋养。它的内腔通到下面的阴道中，并通到两侧的子宫管中。[TFD][VHOG] subdivision of oviduct 输卵管细分