Baylor Bio Lab 2 1106 Exam 2 with 100% complete solutions

What is an animal? Ingestive heterotroph, multicellular, eukaryotic Characteristics of Phylum Porifera -assymetrical bodies without distinct tissues or organs -saclike bodies consisting of two layers breached by many pores -internal cavity lines with food filtering cells called choanocytes 01:07 01:22 Characteristics of Phylum Cnidaria -Soft, gelatinous, radially symmetrical bodies whose digestive cavity has a single opening. -possesses tentacles armed with stinging cells called cnidocyte that shoot sharp harpoons called nematocysts. What will happen to disassociated sponge cells? They will survive because they are loosely assembled and self-sufficient. Genus Grantia Phylum Porifera Spicules small, spike shaped particles of calcium carbonate or silicon dioxide that make up the skeleton of some sponges Sessile An organism that does not move. It remains attached to one place. Spongocoel The central cavity of a sponge. Choanocytes flagellated collar cells, generate a water current through the sponge and ingest suspended food Ostium cells pores that allow water to pass in to the sponge Osculum A large opening on a sponge through which filtered water is expelled Amoebocytes Found in sponges, these cells are mobile and perform numerous functions, including reproduction, transport of food particles to nonfeeding cells, and secretion of material that forms the spicules