Each polyp has a cup-like shape with a ring of tentacles around a central opening (pharyn x) that functions as both(prenominal) mouth and anus. The tentacles are tipped with stinging cells called nematocysts. Corals use the nematocysts to wear themselves and to capture prey. The body wall consists of three cell layers: the outside or ectoderm, the middle or mesoderm, and the inner or endoderm. on that point is no skeleton inside the poly...If you want to keep up a full essay, order it on our website: OrderEssay.net
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