This PowerPoint is used as an introduction to animals characteristics in my High School Honors Zoology Class.

1. *List as many characteristics as you can that define something as an “ANIMAL”...

2. CHARACTERISTICS of ANIMALS *to be an “animal” it must:

6. MOTILE: *the ability to MOVE by...

9. WHEN did animals 1st appear on Earth?: 700-800 M.Y. ago

10. VERTEBRATES vs. INVERTEBRATES *presence of a backbone

11. BODY SYMMETRY

14. “ ventral” “ dorsal”

22. Tissue Development

23. EGG + SPERM = ZYGOTE

24. ZYGOTE “ cleavage”

25. ZYGOTE etc... BLASTULA

26. ZYGOTE etc... *certain cells move inward

27. GASTRULA “ ectoderm” “ blastopore” “ endoderm”

28. * DEUTEROSTOMES: (blastopore ---> anus) *PROTOSTOMES: (blastopore ---> mouth)

31. Support & Movement Systems - (3)

32. I. HYDROSTATIC skeleton: *muscles that surround & are supported by water (roundworms & earthworms)

33. II. EXOSKELETON: * “hard shell”… muscles att. to the inside of shell (insects & crustaceans) * limits mobility & growth

34. III. ENDOSKELETON: * rigid framework inside an animal (protects less) (vertebrates/humans) * allows movement & growth

35. DIGESTIVE SYSTEMS

36. I. MOST PRIMITIVE *A cavity where food is partially digested before moved into cells to complete the process (flatworms)

37. II. MEDIUM SOPH. *a two-way digestive system *digested & undigested food mix (cnidarians)

38. III. ADVANCED *food takes a one-way path *w/ special cells to absorb nutrients (fish)

39. REPRODUCTIVE SYSTEMS

40. *Nearly ALL animals are capable of sexual reproduction.

41. hermaphrodite (An advantage for members of small populations that seldom encounter others of the same sp.) *An animal w/ fully functioning male & female rep. structures is a:

42. * timed gamete production *

43. Asexual

44. sexual

46. NICHE

52. *The End*