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Depending on the species, the blastopore has been reported to become the mouth (protostomy), the anus (deuterostomy), both mouth and anus (amphistomy), or neither (i.e., the blastopore closes).
blastopore [Gr. blastos-germ, bud, shoot; L. porus-a pore or passage]. The opening between the archenteron and outside of the embryo, formed by invagination during gastrulation.In some organ isms, it becomes the anus. blastopore. (blas-toh-por) [Gk.t. Louis, MO. C. V. Mosby ... blastopore [Gr. blastos-germ, bud, shoot; L. porus-a pore or passage]. The opening between the archenteron and outside of the embryo, formed by invagination during gastrulation. In some organ isms, it becomes the anus.