| http://www.w3.org/ns/prov#value | - dia, anus, nephridiopore and gonopore are located; mantle secretes the shell and forms siphons, tentacles, and other structures ??? ??? ??? mantle cavity Cavity in molluscs formed by the mantle; ctenidia lie in cavity and anus, gonopore, and nephridiopore open into cavity ??? ??? ??? medusa Body form in Cnidaria; upside down sac with tentacles ??? ??? ??? mesoglea Non-cellular layer of jelly and
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