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CNIDARIANS By Brandon L and Donavin S Radial Symmetry: Central Axis No True Muscles Hydrostatic “Skeleton” SYMMETRY AND MOVEMENT Nerve Net NERVOUS SYSTEM Two Way Extra Cellular Digestion Gastro-vascular Cavity DIGESTIVE SYSTEM Diffusion Passed through mouth into the Coelenteron Coelenteron similar to human stomach EXCRETORY SYSTEM Diffusion All Cells In Contact with Water CIRCULATORY SYSTEM Diffusion No Respiratory Organs Through Body Cells RESPIRATORY SYSTEM Hydrostatic Skeleton Three Layers Epidermis Mesoglea Gastrodermis SKELETAL SYSTEM Sexual and Asexual Sperm Release and Egg Carry Planula Attaches to hard surface In Time new Polyp gets formed from first Polyp REPRODUCTIVE SYSTEM Taxonomic class very small predatory animals some solitary and some colonial most living in salt water EX. Fire corals, hydra HYDROZOA Marine class Can bud and split minerals EX. Rhizostomae SCYPHOZOA No medusa stage Sperm and egg creates planula EX. Corals, sea anemones, sea fans ANTHOZOA Jellyfish CNIDERIAN Sea Anemone Hydra CNIDERIANS Sea coral FORMS OF CNIDARIAN
