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17.1 Common Traits of Vertebrates


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Class notes for 17.1.

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17.1 Common Traits of Vertebrates

  1. 1. Vertebrae<br /><ul><li>Bones located in the middle of your back
  2. 2. Joined together with cartilage to form the backbone
  3. 3. Protects the spinal chord
  4. 4. Notochord: flexible skeletal rod – is replaced by backbone</li></li></ul><li>Vertebrae<br />
  5. 5. ENDOtherms<br /><ul><li>Animals with CONSTANT internal body temperatures
  6. 6. Body cells produce heat to keep bodies warm</li></ul>**Humans are ENDOTHERMS<br />
  7. 7. Examples of Endotherms<br />
  8. 8. ECTOtherms<br /><ul><li>Animals with bodies that receive heat from the OUTSIDE
  9. 9. Body temperature depends on environment</li></li></ul><li>Ectotherm Examples<br />
  10. 10. Origin of Vertebrates<br /><ul><li>500 million years ago</li></li></ul><li>7 Classes of Vertebrates<br />Class Agnatha {Jawless Fish}<br />Class Chondrichthyes {Cartilaginous Fish}<br />Class Osteichthyes {Bony Fish}<br />Class Amphibia {Amphibians}<br />Class Reptilia {Reptiles}<br />Class Aves {Birds}<br />Class Mammalia {Mammals}<br />