BUCK
发表于 2025-3-28 17:42:15
Fish, Amphibian, Bird and Reptile Placentation,ssman 1987). The most widely used system is an increased secretion of nutrients into the ovarian or uterine cavity and absorption via the fetal gut or skin surface, but a number of genera have produced specialized structures, both embryonic and extraembryonic, some of which closely parallel amniote
物质
发表于 2025-3-28 20:44:33
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Climate
发表于 2025-3-29 02:18:42
Eutheria: Epitheliochorial Placentation Pig and Horse, development essentially involves a vast increase in area with no loss of any layers between the fetal and maternal bloodstreams. The exclusively cellular layers may become exceedingly attenuated, reducing the diffusion distance as pregnancy proceeds, but all persist to term (Amoroso 1952; Steven 19
制定
发表于 2025-3-29 03:19:06
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Microgram
发表于 2025-3-29 09:37:11
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Eructation
发表于 2025-3-29 13:03:38
Haemochorial Placentation: Mouse, Rabbit, Man, Apes, Monkeys,nd to such a sequence; with the loss of all the maternal tissue, maternal blood irrigates the chorioallantoic fetal trophectoderm directly (Fig. 1.5)..Previous suggestions that in some species the fetal trophectoderm is also lost have not been substantiated by subsequent EM studies. The trophectoder
Asseverate
发表于 2025-3-29 15:33:19
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音乐戏剧
发表于 2025-3-29 19:47:38
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