Reptiles and Birds - PowerPoint PPT Presentation

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Reptiles and Birds

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  1. Reptiles and Birds

  2. REPTILE FACTS • first to adapt completely to land

  3. REPTILE FACTS • scaly skin • legs lower (not at 90o angles) • claws • ectotherms

  4. REPTILE FACTS • most have three- chambered hearts • some have four-chambered hearts which allow for more energy (O2 blood separate)

  5. REPTILE FACTS amniotic egg eliminates need to reproduce in H2O

  6. REPTILE FACTS • turtles have shells • crocodiles & alligators are the largest • snakes & lizards live almost everywhere • Rhynchocephalia—primitive reptilesOnly the tuatara still exists

  7. AVIAN FACTS • “Avian” means “bird” • Only birds have feathers • Evolved from therapods (feathered dinosaurs) • Archaepteryx (1st bird?)

  8. AVIAN FACTS • Have wings & large sternum for flight

  9. AVIAN FACTS • 4-chambered heart • Fast heart rate (1000+ beats/min) • Special respiratory system

  10. AVIAN FACTS • Endotherms • Internal reproduction • Amniotic egg with hard shell • Diversity of species