blastopore

[blas-tuh-pawr, -pohr]

noun

Embryology.

1. the opening of an archenteron.

Other Word Forms

• blastoporic adjective
• blastoporal adjective

Word History and Origins

Origin of blastopore¹

1875–80; blasto- + -pore passage; pore ²

Example Sentences

Amniotes, like chickens and humans, will have developed a primitive streak, the precursor to the brain and skin, while fish and amphibians will have developed a spherical-shaped blastopore.

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It has usually been regarded as representing both endoderm and mesoderm, and the groove which usually leads to its formation has been compared to the abnormally elongated blastopore of a typical gastrula.

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The blastopore persists as the anal opening of the adult.

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The blastopore generally occupies a position corresponding to the posterior end of the body.

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The blastopore now closes along the middle part of its course, which coincides in position with the future “foot.”

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