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 – 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