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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).
In biology and in medicine, the suffix -blast refers to immature cells. You can have blasts that give rise to all kinds of different specialized cells. So for example, neuroblasts give rise to nerve cells; adipoblasts give rise to fat cells, or adipocytes, etc.