Reptiles and Birds. REPTILE FACTS first to adapt completely to land.

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Presentation transcript:

Reptiles and Birds

REPTILE FACTS first to adapt completely to land

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

REPTILE FACTS most have three- chambered hearts some have four- chambered hearts which allow for more energy (O 2 blood separate)

REPTILE FACTS amniotic egg eliminates need to reproduce in H 2 O

REPTILE FACTS turtles have shells crocodiles & alligators are the largest snakes & lizards live almost everywhere Rhynchocephalia—primitive reptiles Only the tuatara still exists

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

AVIAN FACTS Have wings & large sternum for flight

AVIAN FACTS 4-chambered heart Fast heart rate ( beats/min) Special respiratory system

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

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