Quiz 8 Study Guide

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Across
  1. 2. heart pumps this throughout the body
  2. 3. animals need to find a way to get rid of wastes without wasting too much of this
  3. 6. tiny air sacs in lungs
  4. 8. a type of loop circulation that has blood moving in two loops
  5. 10. a type of loop circulation that has blood moving in one circle
  6. 11. circulatory systems that allow blood direct contact with organs
  7. 12. breathing structures of mammals
  8. 13. simple animals can breathe and release wastes through this
Down
  1. 1. circulatory system for more complex animals
  2. 4. scientific term of getting rid of wastes
  3. 5. many animals filter wastes through this organ
  4. 7. animals need this element from the air
  5. 9. respiratory structures of aquatic animals such as fish