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Unit 9 Chapter 31 Reptiles and Birds

Unit 9 Chapter 31 Reptiles and Birds. What is a Reptile?. Ectotherms with dry, scaly skin, with claws on their toes More advanced 3 chambered hearts. What is a Reptile?. Amniotic eggs Allows reptiles to be successful on land. Diversity of Reptiles. Turtles and tortoises

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Unit 9 Chapter 31 Reptiles and Birds

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  1. Unit 9Chapter 31Reptiles and Birds

  2. What is a Reptile? • Ectotherms with dry, scaly skin, with claws on their toes • More advanced 3 chambered hearts

  3. What is a Reptile? • Amniotic eggs • Allows reptiles to be successful on land

  4. Diversity of Reptiles • Turtles and tortoises • The only Reptiles with hinged shells • Crocodilians • The only Reptiles with 4 chambered hearts

  5. Diversity of Reptiles • Lizards • Includes the largest lizard, the Komodo Dragon • Snakes • Includes rattlesnakes, copperheads, water moccasins, & coral snakes

  6. Diversity of Reptiles • Snakes feed in a variety of ways: • Constrictors kill prey by suffocation • Venomous snakes kill prey by poisoning • Most snakes simply grab prey and swallow it whole

  7. Diversity of Reptiles • Reptiles have special sense organs: • “Pit” of rattlesnakes allows them to detect heat of warm-blooded prey • Jacobson’s organ in roof of snakes mouth allows them to detect odors brought in by forked tongue

  8. What is a Bird? • Class Aves • Feathers, modified scales that provide insulation & flight • Wings, power provided by muscles attached to sternum (breastbone)

  9. What is a Bird? • Other adaptations for flight include hollow bones, high metabolism maintained by 4 chambered heart & air sacs • Endotherm, maintains a nearly constant body temperature that does not depend on environment

  10. Diversity of Birds • A bird’s lifestyle is determined by its type of beak and feet.

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