trophoblast

Japanese: trophoblast

…Fetal blood flows through the villi (Figure). Fetal blood comes into contact with maternal blood through the surface of the villi, but histologically, between the two blood streams, from the maternal blood side, there are trophoblasts (syncytium cells and Langhans' cells), the basement membrane beneath these cells, the villous stroma, and the fetal capillary walls, each of which plays an important role in the transport of substances as described below. The total surface area of the villi involved in this exchange of substances is said to reach 13 to 14 m2, which is about 10 times the surface area of an adult's body. …

From [Pregnancy]

…(3) Implantation The late morula stage cells are divided into two layers, an inner one and an outer one. The outer one is called the trophoblast (also called the trophoblast), which forms the membrane of the fertilized egg and is responsible for its nutrition. The inner one is called the embryoblast (also called the embryonic embryo, embryonic pole, or embryonic node), which will later form the fetus (Figure 2). …

*Some of the terminology that mentions "trophoblast" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…絨毛の中には胎児血が流れている(図)。　胎児血は絨毛表面を介して母体血と接しているが，組織学的には両者の血液の間に，母体血側からトロホブラストtrophoblast(シンシチウム細胞syncytium cellとラングハンス細胞Langhans’ cell)，その細胞下の基底膜，絨毛間質，胎児毛細血管壁が存在し，後に述べるような物質の輸送にそれぞれ重要な役割を果たしている。この物質の交換にあずかる絨毛の全表面は13～14m2に達するとされ，これは成人の体表面積の約10倍になる。…

【妊娠】より

…(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。内側の細胞群は胎芽胚葉embryoblast(胎芽胚，胎芽極あるいは胚結節ともいう)といい，のちに胎児を形成する(図2)。…

※「trophoblast」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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