<p> Organism Symmetry Feeding Movement Circula Body Back Nervous Reproduc Excretion Respiration (Digestive -tory Covering -bone System -tion System) System Porifera- Asymmetr Filter Only as a None epidermis None None Asexual Diffusion Diffusion Ex. sponges -ical feeder larvae budding or sexual gametes Cnidaria- Radial 1 opening Medusa None epidermis None None Asexual Diffusion Diffusion Ex. jelly fish, anemone into bag- (larval budding like stage) or sexual intestine gametes Platyhelminthes Bilateral 1 opening Gliding Flame epidermis None Nerve net Asexual Flame skin Ex. planarian, tape into bag- (free cells or sexual cells & worm (flat worms) like living) remove diffusion intestine x-s water Nematoda Bilateral Digestive Extend & Open epidermis None Nerve net sexual Diffusion skin (round worms) tract with contract circ. with a through Ex. Hookworm, Pin two body system thick body wall Worm openings cuticle Mollusca- Bilateral Digestive By siphon open circ epidermis None 3 ganglia sexual nephridia gills Ex. squid, snail, clam, tract (jet) system- 2 or shell in clams; abalone Chamber brains in heart squids Annelida- Bilateral Digestive Extend & Closed epidermis None 3 anterior Both Nephridia Skin Segmented worms tract contract w/ 5 tube ganglia & sexes on Ex. Earthworms body hearts ventral one work nrve cord Arachnida Bilateral Digestive 8 legs Open Exoskel None 3 anterior 1 sex per Nephridia Book lungs Ex. spider, tick, scorpion tract with one -eton of ganglia & spider heart chitin ventral nrve cord Insecta Bilateral Digestive 6 legs Open Exoskel None 3 anterior 1 sex per Malphi trachea tract with one -eton of ganglia & insect -gian All true bugs heart chitin ventral tubules nrve cord Organism Symmetry Feeding Movement Circulati Body Back Nervous Reproduc Excretion Respiration on Cover -bone System -tion Echinodermata- Radial Prys open Can crawl Water Tough none None Sexual Nephridia gills prey, & with rays vascular bumpy By Ex. starfish drops system skin gamete stomach into then Fish Bilateral Digestive Fins Closed, 2 Scales & Yes ! Complex, Sexual kidneys Gills tract chamber mucus with a heart brain Amphibian Bilateral Digestive Legs & Closed, 3 Skin Yes ! Complex, Sexual kidneys Gills & tract fins chamber with a skin or heart brain lungs Reptiles Bilateral Digestive Legs Closed, Scales Yes ! Complex, Sexual kidneys Lungs tract 31/2 with a chamber brain heart Birds Bilateral Digestive Wings & Closed, 4 Feathers Yes ! Complex, Sexual kidneys Lungs & tract legs chamber with a air sacs heart brain Mammals Bilateral Digestive Legs, fins, Closed, 4 Hair of Yes ! Complex, Sexual kidneys lungs tract flippers, chamber fur with a wings heart brain Other:</p><p>Fish-Teeth; external fertilization; cold blooded</p><p>Amphibians-No claws; No teeth; external fertilization; cold blooded</p><p>Reptiles-Internal fertilization; claws; teeth; cold blooded</p><p>Birds-No teeth; claws; Internal fertilization; Hot blooded</p><p>Mammal-Teeth, Milt to young; Internal fertilization; Nails; Hot blooded.</p>