1. Diversity 2
Animals

17. Diploblastic
“Monoblastic”
Triploblastic

18. 10hrs
Blastula Forms
90min
20min
12min
2min
1.5min
1min
30sec
10sec
2sec
0sec

19. Blastula is a hollow ball of cells
It currently has one cell layer (ectoderm)
Blastula

20. Formation of Diploblastic Tissue

23. Formation of Triploblastic Tissue

25. Sponges
Jellyfish
Comb Jellies
Flat Worms
Round Worms
Rotifers
Snails
Earthworms
Starfish
Fish, Amphibians
Reptiles, Birds,
Mammals

26. Animal Systems
• Animals must obtain energy by eating
• Major Systems:
– Digestive System
– Circulatory System
– Excretory System
– Locomotive System
– Sensory System

27. Digestive Systems
• Diffusion, phagocytosis
– Small animals, single-celled
• Gastrovascular Cavity
– Jellyfish
• Digestive Tract
– Everything else

28. Hyaline Caps
Phagocytosis in an Amoeba

33. Circulatory Systems
• Diffusion
– Small animals, single-celled
• Open Circulatory System
– Worms, some mollusks, arthropods
• Closed Circulatory System
– Everything else

35. Locomotion Systems
• Endoskeleton vs Exoskeleton
– Skeleton is for muscle attachment and
support against gravity
– Muscle can attach to something that is inside
the animal or outside the animal
• Endoskeleton = inside
• Exoskeleton = outside

36. Exoskeleton

37. Endoskeleton

39. Sensory Systems
• Nerve Net
– Jellyfish
• Ganglia
– Flatworms
• Bilateral Brain
– Earthworms
• Brain

42. The Vertebrates
Animals with a Backbone

45. New Tetrapod - Tiktaalik

51. Spiny Echidna Development
Lays Egg in Pouch
Baby Hatches/Nurses
Baby Leaves Pouch when
Spine Develop

56. Teratogens

57. What is Endothermy?
• Description of where and animal gets
its heat from:
– Ectotherms get heat from external
sources (Sun)
– Endotherms get heat from internal
sources (metabolism)

59. Who are the Endotherms?
Birds
Mammals

60. All of these
Animals are
Endothermic to
Some Degree!!