Lec3 2 diversity2 (1)

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Lec3 2 diversity2 (1)

  1. 1. Diversity 2 Animals
  2. 2. Diploblastic “Monoblastic” Triploblastic
  3. 3. 10hrs Blastula Forms 90min 20min 12min 2min 1.5min 1min 30sec 10sec 2sec 0sec
  4. 4. Blastula is a hollow ball of cells It currently has one cell layer (ectoderm) Blastula
  5. 5. Formation of Diploblastic Tissue
  6. 6. Formation of Triploblastic Tissue
  7. 7. Sponges Jellyfish Comb Jellies Flat Worms Round Worms Rotifers Snails Earthworms Starfish Fish, Amphibians Reptiles, Birds, Mammals
  8. 8. Animal Systems • Animals must obtain energy by eating • Major Systems: – Digestive System – Circulatory System – Excretory System – Locomotive System – Sensory System
  9. 9. Digestive Systems • Diffusion, phagocytosis – Small animals, single-celled • Gastrovascular Cavity – Jellyfish • Digestive Tract – Everything else
  10. 10. Hyaline Caps Phagocytosis in an Amoeba
  11. 11. Circulatory Systems • Diffusion – Small animals, single-celled • Open Circulatory System – Worms, some mollusks, arthropods • Closed Circulatory System – Everything else
  12. 12. 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
  13. 13. Exoskeleton
  14. 14. Endoskeleton
  15. 15. Sensory Systems • Nerve Net – Jellyfish • Ganglia – Flatworms • Bilateral Brain – Earthworms • Brain
  16. 16. The Vertebrates Animals with a Backbone
  17. 17. New Tetrapod - Tiktaalik
  18. 18. Spiny Echidna Development Lays Egg in Pouch Baby Hatches/Nurses Baby Leaves Pouch when Spine Develop
  19. 19. Teratogens
  20. 20. 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)
  21. 21. Who are the Endotherms? Birds Mammals
  22. 22. All of these Animals are Endothermic to Some Degree!!

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