The Reptiles

Class: Reptilia
  • Jessica H. Lewis


Reptilia is the first class of vertebrates completely adapted to life on land. They have dry, cornified skin, often scaly or horny, fore and hindlimbs (lost in snakes), a bony skeleton, and lungs. In general, reptiles are omnivorous, eating whatever is available. Some eat only insects or small animals. Reptiles may live for many years. Most lay eggs, but a few produce living offspring. Nurturing is not a reptilian characteristic, and the young are “on their own” and are often prey for other animals. Some ancient reptiles developed into dinosaurs, which flourished from 200 to 65 mya. The cause of their slow extinction is still controversial.


Buffy Coat Green Turtle Marine Turtle Clot Retraction Recalcification Time 
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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Jessica H. Lewis
    • 1
  1. 1.University of Pittsburgh School of Medicine and Central Blood BankPittsburghUSA

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