In the gastrula stage of an embryo, the opening that connects the archenteron with the outside; represents the future mouth in some animals (protostomes), the future anus in others (deutrostomes.)
Blas"to*pore (?), n. [Gr. sprout + E. pore.] Biol.
The pore or opening leading into the cavity of invagination, or archenteron.
© Webster 1913.
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