Reptiles and Birds

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Reptiles and Birds
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REPTILE FACTS

• first to adapt completely to land

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REPTILE FACTS

• scaly skin
• legs lower (not at 90o angles)
• claws
• ectotherms

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REPTILE FACTS

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

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REPTILE FACTS

• amniotic egg eliminates need to reproduce in H2O

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REPTILE FACTS

• turtles have shells
• crocodiles alligators are the largest
• snakes lizards live almost everywhere
• Rhynchocephaliaprimitive reptilesOnly the
  tuatara still exists

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AVIAN FACTS

• Avian means bird
• Only birds have feathers
• Evolved from therapods (feathered dinosaurs)
• Archaepteryx (1st bird?)

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AVIAN FACTS

• Have wings large sternum for flight

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AVIAN FACTS

• 4-chambered heart
• Fast heart rate (1000 beats/min)
• Special respiratory system

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AVIAN FACTS

• Endotherms
• Internal reproduction
• Amniotic egg with hard shell
• Diversity of species

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