Biology Homework

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Across
  1. 4. respiration – energy release using oxygen
  2. 8. cavity – space where lungs sit
  3. 9. – process of releasing energy
  4. 10. – gas needed for breathing
  5. 12. – collarbone
  6. 14. – working in opposite pairs
  7. 15. volume – amount of air the lungs can hold
  8. 17. – simple sugar for energy
  9. 18. – breathing muscle
  10. 19. – tissues that move the body
Down
  1. 1. – tiny air sacs in lungs
  2. 2. – air taken in or out
  3. 3. – painful swollen joints
  4. 5. – smooth joint tissue
  5. 6. – windpipe
  6. 7. – main air tubes
  7. 11. – kneecap
  8. 13. – skull
  9. 16. – joins muscle to bone