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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).
Describe the process of erythropoiesis. -pluripotent stem cell becomes an erythrocyte colony-forming unit (ecfu) -the hormone erythropoietin (EPO) stimulates the ecfu to develop into an erythroblast. -erythroblast (aka erythrocyte precursors) develop a nucleus, ribosomes, golgi, as well as hemoglobin.