Amphiblastoma

Japanese: amphiblastula
Amphiblastoma

…The fertilized egg undergoes cleavage, and when it becomes a blastula with a ciliated surface, it leaves the parent's body and becomes a free-swimming larva. There are two types of larvae: hollow larvae (amphiblastula) and solid larvae (parenchymula). The hollow larvae settle at the anterior end, and part of the cell layer invaginates inward to form the archenteron. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…受精卵は卵割を行い,表面が繊毛で覆われた胞胚になると,親の体内から外にでて自由遊泳をする。こういう幼生には,中空幼生(アンフィブラストゥラamphiblastula)と中実幼生(パレンキムラparenchymula)との2種類がある。中空幼生は前端部で定着し,細胞層の一部が内部に陥入して原腸を形成する。…

※「amphiblastula」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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