Animal Review 2

Key Characteristics: Radial Symmetry, stinging cells ranged along tentacles, nervous system but no brain. Invertebrate.

Key Characteristics: Thick skin that helps conserve water along with kidneys that conserve water. Eggs with leathery shells. Vertebrate.

Example animals: Planarians, nemotodes

Example Animals: Chicken, Flamingo

Key Characteristics: Asymmetry with no organs. Filter feeds and does not move for much of its life. Invertebrate.

Key Characteristics: Gills, spends life underwater, many have scales. Lay eggs without a shell. Three groups: jawless, cartilaginous, bony. Vertebrates.

Example Animals: Sea slugs, octopuses, mussels

Key Characteristics: Double Life: part of life in the water, part on land. Thin skin through which they breathe, eggs with no shells. Vertebrates.

Example Animals: Salamanders, frogs, toads, caecilians

Example Animal: Sea Sponge

Key Characteristics: Hollow bones, feathers, hard-shelled eggs. Vertebrates.

Key Characteristics: Bilateral symmetry. Simplest organism with a brain. Digestive system. Invertebrate.

Key Characteristics: Bilateral Symmetry. Soft bodies, often protected by a shell. Muscular feet aid in movement. Invertebrate.

Example Animals: millipede, shrimp, bee, butterfly

Key Characteristics: Most have radial symmetry as adults. Water vascular system with an endoskeleton. Bumpy skin. Tube feet. Invertebrate.