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Reptiles 31


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Reptiles 31

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