Decidua basalis - Decidua basalis

Japanese: 基底脱落膜 - きていだつらくまく
Decidua basalis - Decidua basalis

… When the fertilized egg implants, the endometrium continues to thicken and grow, becoming the decidua. The decidua at the base where the egg implants is called the decidua basalis or floor decidua, the endometrium that forms at the entrance of the fertilized egg, i.e., on the surface of the egg, is called the decidua capsularis, and the remaining decidua that is not directly related to the egg is called the decidua parietalis. (4) Formation of the placenta and villous membrane Immediately after implantation, the trophoblast of the fertilized egg grows rapidly, forming villous processes on its surface that are made up of syncytiotrophoblast cells and trophoblast cells, just like the hair roots of plants. …

*Some of the terminology that refers to "decidua basalis" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 受精卵が着床すると,子宮内膜はさらに肥大増殖して脱落膜deciduaとなる。卵の着床した基底部の脱落膜を基底脱落膜または床脱落膜といい,受精卵の進入口すなわち卵の表面に形成される内膜を被包脱落膜,卵に直接関係のない残りの脱落膜を壁側脱落膜という。(4)胎盤と卵膜の形成 着床直後から受精卵の栄養胚葉は急速に増殖し,あたかも草木の毛根のように,その表面に合胞体栄養膜細胞と栄養膜細胞からなる絨毛(じゆうもう)突起を形成する。…

※「基底脱落膜」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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