組培人體胚胎學ppt課件-文庫吧資料
2025-01-11 16:18本頁面
【正文】 a pellucida before implanting 子宮底和體 ,最多見后壁的中上份 宮外孕 前置胎盤 植入后的變化 （一）子宮內(nèi)膜的變化 蛻膜 decidua 蛻膜反應 decidual response （二）分部 基蛻膜 decidua basalis 包蛻膜 decidua capsularis 壁蛻膜 decidua parietalis applications (1)Chromosomal abnormalities result in spontaneous abortion or abnormal development It is estimated that one third of all conceptions （孕體） in normal, healthy women abort spontaneously。 （ 3 ） 精子獲能 ,卵子在第二次成熟分裂的中期 （ 4 ） 如期相遇 （ 5 ） 生殖道暢通 （ 6 ） 內(nèi)環(huán)境正常 A 內(nèi)分泌 B 抗精子抗體 C精神狀態(tài) process of fertilization 受精過程 Sperm binds in a humanspecific interaction with a zp3(精卵識別 ) Acrosome reaction(頂體反應 ):The acrosome is induced to release degradative (降解 )enzymes that allow the sperm to perate（ 穿透） the zona pellucida. The cell membranes of the two cells fuse.(兩膜融合 ) Zona reaction(透明帶反應 ):Cortical granules release into the perivitelline（ 卵黃周的） space and interact with the zona pellucida. It alters the sperm receptor molecules,causing the zona to bee imperable by additional spermatozoa. Female and male pronuclei formed(兩性原核形成 ) Two pronuclei membranes disappear as both maternal and paternal chromosomes are replicated in preparation for the first cleavage.(兩核融合 ) F. Significance of fertilization (受精的意義 ) （ 1 ） Form a new life (形成新個體 ) （ 2 ） Resume 2N quantity o
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