Invagination

Japanese: invagination
Invagination

…These changes gradually spread to the vegetal pole. This process, generally called invagination, is common to all animal embryos that undergo germ layer formation. Germ layer formation is said to be the first morphogenetic movement in the development of an animal individual, and the expression of cell adhesion and motility is an extremely important factor in the establishment of this process. …

From [Occurrence]

…There are two main ways in which the archenteron forms. The first is called invagination, in which the cell layer on the vegetal pole side folds into the blastocoel (Figure 3-b, Figure 3-c). The second is called epiboly, in which the small, frequently dividing cells on the animal pole side envelop the larger cells on the vegetal pole side (Figure 3-a). …

*Some of the terminology explanations that mention "invagination" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…このような変化がしだいに植物極側におよんでいく。一般に陥入invaginationと呼ばれるこのような過程は,胚葉形成をおこなうすべての動物胚に普遍的であるといってよい。胚葉形成は動物個体の発生過程での最初の形態形成運動といわれるが,これが成立するには細胞の接着性や運動性の発現がきわめて重要な要素をなしている。…

【発生】より

…原腸の形成には二つのおもな方法がある。第1の方法は陥入invaginationとよばれ,植物極側の細胞層が胞胚腔内に折れ込むことによる(図3‐b,図3‐c)。第2の方法はおおいかぶせ法epibolyとよばれ,小型で分裂頻度の高い動物極側の細胞が,植物極側の大型の細胞を包み込むことによる(図3‐a)。…

※「invagination」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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