1. Echino = spinyDermis = skin

2. Phylum Echinodermata Echinoderms only live in the seas Examples are sea star, sea urchins, brittle stars, sea lilies, and sand dollars Source

3. Echinoderm Characteristics No cephalization Most have two surfaces: Oral surface: where the mouth is located Aboral surface: the opposite side where the anus is Larvae have Bilateral Symmetry; Adults have Radial Symmetry Internal skeleton is formed of hardened plates of calcium carbonate Source

4. Echinoderms: Water Vascular System Water vascular system used to carry out respiration, circulation, and movement Suction-cup like tube feet used to walk or pry open prey such as clams Source

5. Echinoderm Feeding Echinoderm species feed on various things; some are predators and some are detritivores. A sea star can push its own stomach out of its mouth, pours out enzymes, and digest a mollusk right in its own shell. Watch the 3 minute video below to see how this happens! Click here to see video.Click here to see video. Then click on: “ 22o K ” on the right side of the screen under the picture. Echinoderms release solid waste from their anus.

6. Echinoderm Response and Movement Do not have a highly developed nervous system; no cephalization Have sensory cells to detect light, gravity, and chemicals released by potential prey Small muscle fibers are attached from the endoskeleton to tube feet to aide in locomotion Source

7. Echinoderm Reproduction External Fertilization occurs as eggs and sperm are released into the water. The young larvae have bilateral symmetry but develop into adults with radial symmetry. Source

8. Digestive System  Green Male or Female Reproductive System  Dark blue or Pink Water vascular system  Light blue or turquoise Nervous System  Orange Source