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Vertebrates: Part II

Vertebrates: Part II. Reptiles & Birds. Reptiles. Dry body covering Scales made of keratin Heart has 3 chambers Well-developed lungs Toes have claws. Reptile Reproduction. Amniote Egg developed Internal fertilization. Homeostasis. Modern reptiles = ectotherms

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Vertebrates: Part II

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  1. Vertebrates: Part II Reptiles & Birds

  2. Reptiles • Dry body covering • Scales made of keratin • Heart has 3 chambers • Well-developed lungs • Toes have claws

  3. Reptile Reproduction • Amniote Egg developed • Internal fertilization

  4. Homeostasis • Modern reptiles = ectotherms • Dinosaurs may have been endotherms

  5. Special Senses • Jacobson’s organ • Visual range • Heat-sensing pits

  6. Classes of Reptiles • Rhynchocephalia • Testudo • Squamata • Crocodilia

  7. Birds • Body covered by feathers • Endothermic • Bones have air sacs • Toothless bill

  8. Bird Adaptations • Feet differ by lifestyle • Bill based on food type • Forelimbs = wings

  9. Feather Types • Down • Filoplumes • Contour • Flight

  10. Homeostasis • Endotherms • 4-chamber heart • High metabolism • Rapid heartbeat

  11. Other Systems • Nervous: highly developed • Excretory: reduced • Digestive • Crop – stores food for later • Gizzard – grinds food

  12. Bird Reproduction • System Reduced • Produce Amniote Egg • Internal Fertilization

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