1. (Cnidarians; phylum Cnidaria; "An alternative name for the phylum is Coelenterata, which refers to their simple organization around a central body cavity (the coelenteron)

2. False, Cnidarians have 2 body layers: epidermis and gastrodermis with mesoglea) True or False: the cnidarian gastrovascular cavity (coelenteron) serves as a mouth and anus.