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26-1 Introduction to the Animal Kingdom

26-1 Introduction to the Animal Kingdom. The Animal Kingdom. Animals are: Multicellular Eukaryotic Heterotrophs Organisms with cells without cell walls. All animals carry out the following functions:. Feeding: animals “eat” or “ingest” their food

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26-1 Introduction to the Animal Kingdom

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  1. 26-1 Introduction to the Animal Kingdom

  2. The Animal Kingdom • Animals are: • Multicellular • Eukaryotic • Heterotrophs • Organisms with cells without cell walls

  3. All animals carry out the following functions: • Feeding: animals “eat” or “ingest” their food • Respiration: taking in oxygen and giving off carbon dioxide • Circulation: to move materials around inside of body • Excretion: system to eliminate bodily wastes

  4. All animals carry out the following functions: • Response: after sensing changes in environment, animals respond to change • Movement: Although some do not move, most animals are motile (able to move) • Reproduction: carrying on genetic code in offspring

  5. Invertebrates • Invertebrates • Makes up 95% of all animal species • Do not have a backbone or vertebral column • Examples: worms, insects, crabs, starfish, and jellyfish

  6. Vertebrates • Makes up only 5% of all animal species • They have a backbone or vertebral column • Examples: humans, fish, reptiles, amphibians, and birds

  7. Body Symmetry • Categorizes animals based on 3 basic body plans: • Asymmetrical: lacking an organized body plan; **only in the sponges

  8. Radial Symmetry: body plan of an organism that can be divided into two equal halves when any line is drawn through its center (examples: starfish, jellyfish, and sea anemones)

  9. Bilateral Symmetry: body plan of organism that can be divided into two equal halves by only one line drawn through its center (examples: crabs, insects, fish and humans)

  10. Symmetry Review

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