1. Animal Kingdom Basics

2. Body Areas Head Back Tail end Belly

3. Symmetry: Arrangement of the body parts around a central axis

4. Asymmetry Body that cannot be divided into equal parts

5. Radial Symmetry Body arranged around a central axis

6. Bilateral Symmetry Body that can be divided into equal halves

7. Identify the following examples of symmetry as asymmetrical, radial, or bilateral

14. External Segmentation Segments located on the outside of the body

16. Internal Segmentation Segments located on the inside of the body

18. Skeletal System Provides structure and support for animals

19. Exoskeleton Skeleton on the outside of the body; external skeleton

20. *

21. Endoskeleton Skeleton on the inside of the body; internal skeleton

22. Hydrostatic skeleton Fluid-filled cavity surrounded by muscles; fluid provides support

23. Digestive System Breaks down food into energy

24. Two-way Digestion* One opening; food goes in out the same opening; moves in two directions

25. One-way Digestion Two openings; Food goes in the “mouth” and out the “anus”; moves in one direction

26. Circulatory System Transports oxygen throughout an organism

27. Closed Circulatory System Blood moves throughout an organism closed within blood vessels

28. Open Circulatory System “Blood” moves openly throughout an organism; No vessels

29. Respiratory System Exchange gases; Oxygen is taken in and Carbon Dioxide is released.

30. Diffusion Oxygen moves across a thin membrane; carbon dioxide is release

31. Feather-like structures that take in dissolved oxygen from aquatic environments; releases carbon dioxide Gills

32. Lungs Organ found in animals that take in oxygen from the atmosphere; releases carbon dioxide

33. Nervous System Transmits signals throughout an organism; allows a response to a stimulus

34. Nerve Net Net of nerves that spreads throughout an organism; lacks a control center

35. Nerve Cell Control center; nerve cords extend throughout body; receive and carry messages

36. Integument Outermost layer of an animal; functions in protection from dehydration, freezing, etc.

42. Excretory System Gets rid of waste in an organism

43. Reproductive System Produces offspring

44. Budding Offspring grows from parent; Asexual reproduction; Identical to parent

45. Fragmentation An organism is broken into pieces; the pieces grow into a new organism

46. Hermaphrodite Both sexes are present; produce sperm/egg

47. External Fertilization Union of the egg and sperm outside of the organism

48. Internal Fertilization Union of egg and sperm on the inside of an organism