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Unformatted text preview: - No sensory antennae- Cephalothorax (fused head and thorax) and abdomen- Myriapoda- Millipedes: herbivores; 2 pairs walking legs per segment- Emit hydrogen cyanide gas, monkey perfume- Centipedes: carnivores; 1 pair walking legs per segment- Hexapoda- Hexapods are insects, which possess:- 3 basic body parts (head, thorax, and abdomen)- 3 pair of jointed legs- 2 antennae- Crustacea- Crabs, shrimp, barnacles, lobster- Marine and freshwater (a few terrestrial) Phylum Ecinodermata- spiny skin- StarFsh, brittle stars, sea urchins, sea cucumbers, sea feathers- Endoskeleton of calcareous plates- Closely related to chordates- Water vascular system: tube feet- Adults have radial symmetry, larvae are bilateral Water Vascular System- Water Vascular system: hydraulic system of closed tubes Flled with sea water; used for locomotion, food/waste transport and respiration...
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- Spring '08