gastrula

Speech parts

1. gastrula - Noun

2. gastrula - Adjective

Meaning

An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea.

Of or pertaining to a gastrula.

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An ancestral form existed, known as the gastrea, which was a common ancestor to the corresponding gastrula. Source: Internet

Haeckel portrays a concrete demonstration of his Biogenetic Law through his ‘Gastrea’ theory, in which he argues that the early cup-shaped gastrula stage of development is a universal feature of multi-celled animals. Source: Internet

The parts that are autotomised or the buds may develop directly into fully formed larvae or may develop through a gastrula or even a blastula stage. Source: Internet

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