the body sysytems

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Across
  1. 2. the smallest blood vessels
  2. 3. the name for the four muscles at the front of the thigh
  3. 4. the part of the blood which allows clotting to occur
  4. 9. a blood vessel with valves
  5. 10. where gaseous exchange takes place
  6. 11. another word for heart rate
  7. 13. the type of muscle action when 2 muscles work together to produce movement
  8. 14. a range of movement
  9. 15. the large muscle separating the chest from the stomach
  10. 18. the gas muscles need to work efficiently
Down
  1. 1. the alternative name for the windpipe
  2. 5. an organ attached to the ribs
  3. 6. what the body does during exercise to get rid of excess heat
  4. 7. the longest bone in the leg
  5. 8. a type of joint in the body
  6. 12. the muscle that causes the elbow to bend
  7. 13. - respiration without oxygen
  8. 16. the largest artery in the body
  9. 17. one of the 5 functions of the skeleton