胚孔
Blastopore \Blas"to*pore\, n. [Gr. blasto`s sprout + E. pore.]
(Biol.)
The pore or opening leading into the cavity of invagination,
or archenteron.
Note: [See Illust. of {Invagination}.] --Balfour.
blastopore
n : the opening into the archenteron