Notes: Animals. Animal Characteristics. Heterotrophic – obtain food and energy by feeding Multicellular – made of many cells Eukaryotic – contain a nucleus Vertebrates – 5% of all animals Invertebrates – 95 % of all animals. Types of Animal tissues. 4 Types Epithelial – skin
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Heterotrophic – obtain food and energy by feeding
Multicellular – made of many cells
Eukaryotic – contain a nucleus
Vertebrates – 5% of all animals
Invertebrates – 95 % of all animals
Epithelial – skin
Muscular - muscles
Connective –blood and bone
Nervous – nerve cells
Circulation – how materials move around the animal. (diffusion or circulatory systems)
Excretion – removal of waste. Could be cells that pump waste out or organs. Waste is ammonia
Response – nerve cells. This could be a simple nerve net or complex nervous system.
Movement – some animals are sessile – stay attached to something their adult life. Others are motile – move by muscles or muscle-like tissue.
Reproduction – sexual or asexual. Many simple animals have the ability to do both.
Asymmetrical – no body plan Ex. Sponges
Radial symmetry – body parts repeat around the center. Ex. starfish
Bilateral symmetry – body can be divided up into two equal halves (left and right) Ex. whale