Blastopore


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Related to Blastopore: archenteron

blastopore

[′blas·tə‚pȯr]
(embryology)
The opening of the archenteron.

Blastopore

 

(also protostomatic mouth, or gastropore), an opening by means of which the cavity of an animal embryo (in the gastrula stage) interacts with the surrounding environment. In the process of development among some animals (protostomatic), the blastopore becomes a mouth or forms both a mouth and an anal opening; in others (deuterostomatic) an anal opening or nerve intestinal canal is formed in place of the blastopore. This temporarily connects the digestive cavity with the cavity of the nerve tract.

References in periodicals archive ?
The blastopore and archenteron were visible in the diminished vegetal half of chlorpyrifos-treated larvae.
Stage 2: gastrulation, cellular organization, and differentiation are evident; first embryonic membrane is ruptured as the embryo becomes asymmetrical; blastopore can be discerned
The blastopore closed on day 15 when the germ ring completely enveloped the yolk.