…In this way, the fertilized egg reaches the uterine cavity in about 3 to 4 days as an early germinal vesicle consisting of 64 to 128 cells or a late morula consisting of 32 to 64 cells. (3) Implantation The late morula stage cells are divided into two layers, an inner and an outer. The outer layer is called the trophoblast (also called the trophoblast), which forms the covering of the fertilized egg and is responsible for its nutrition. … *Some of the terminology that mentions "implantation" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…こうして,受精卵はほぼ3~4日で,64~128細胞からなる初期胚胞または32~64細胞からなる後期桑実胚期に子宮腔に達する。(3)着床implantation 後期桑実胚期の細胞群は内外2層に分かれる。外側は栄養胚葉trophoblast(栄養膜ともいう)といい,受精卵の被膜をなすとともに,その栄養をつかさどる。… ※「implantation」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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