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Reptiles and Birds

Reptiles and Birds. Reptiles. Vertebrate Dry, scaly skin Lungs Terrestrial eggs Strong Limbs. Form and Function. Ectotherms: can’t generate body heat Internal fertilization & eggs Double-loop circulatory system 3 or 4 chamber heart Excretion: uric acid or ammonia.

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Reptiles and Birds

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  1. Reptiles and Birds

  2. Reptiles • Vertebrate • Dry, scaly skin • Lungs • Terrestrial eggs • Strong Limbs

  3. Form and Function • Ectotherms: can’t generate body heat • Internal fertilization & eggs • Double-loop circulatory system • 3 or 4 chamber heart • Excretion: uric acid or ammonia

  4. Lizards & Snakes • Lizards • Legs • Clawed toes • External ears • Moveable eyelids • Snakes • Legless

  5. Crocodilians • Alligators, crocodiles, caimans, and gavials • Long, broad snout • Carnivores • Protective of young

  6. Turtles and Tortoises Shell Lack teeth Powerful jaws Tuataras Resemble lizards Lack external ears Primitive scales Third Eye Other Groups

  7. Birds • Endotherms: generate body heat • 2 legs: scales • 2 wings • Light weight bones

  8. Form & Function Feathers • Contour: lifting & balance • Down: warmth • Powder Down: repeals H2O • Respiration: one-way flow • Internal fertilization & eggs

  9. Birds • Four-chambered heart • Crop: store & moistens food • Gizzard: grinds food • Excretion: uric acid

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