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Reptiles 31
 

Reptiles 31

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    Reptiles 31 Reptiles 31 Presentation Transcript

    • Tedra McNair April 22, 2009 Period, 2 Chapter 31 Reptiles and Birds
    • Evolution of Reptiles
      • Reptiles evolved from amphibian-like ancestors. Reptiles have evolved into unique forms such as:
      • Turtles, snakes , and dinosaurs, but they also have taken on the appearance and habits of other vertebrate groups, such as sharks and dolphins .
    • Form and Function in Reptiles
      • - Reptiles eat a wide
      • variety of foods.
      • -Reptiles have two spongy
      • lungs that provide more
      • gas-exchange area than
      • those of amphibians.
      • However snakes only have
      • one.
      Respiration Feeding
    • What Is A Reptile?
      • A reptile is a vertebrate that has dry, scaly skin, lungs, and terrestrial eggs with several membranes.
    • Form and Function in Reptiles
      • Reproduction
      • Reptiles reproduce by
      • internal fertilization. This is
      • where the male deposits
      • sperm inside of female.
      • A reptilian egg is created to
      • protect the embryo from
      • drying out. This egg is
      • called an amniotic (am-nee-
      • AHT-IK) egg.
    • The Last Survivors
      • The four surviving groups of reptiles are lizards and snakes, crocodilians , turtles and tortoises, and the tuatara (too-uh-TAH-ruh)
    • What Is a Bird?
      • Birds are reptile-like animals that maintain a constant internal body temperature. They include the following:
      • An outer covering of feathers
      • Two legs that are covered in scales and are used for walking and perching.
      • Front limbs modified into wings.
    • Form, Function, and Flight
      • Body Temperature Control
      • Unlike reptiles, birds can
      • generate their own body heat.
      • Animals that generate their
      • own body heat are called
      • endotherms.
      • Feeding
      • Any body heat that a bird loses
      • must be regained by eating
      • food. The more food a bird
      • eats, the more heat energy its
      • metabolism can generate.