Human Respiration and Circulation

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Across
  1. 4. to take air into the lungs and then to expel it from the lungs
  2. 6. a colorless, odorless gas necessary for almost all life
  3. 8. blood cells blood cells that contain structures that fight infections
  4. 10. upper chamber in the heart from which blood moves to the ventricle
  5. 13. major blood vessel through which oxygen-rich blood leaves the heart
  6. 14. the organ system that moves blood throughout the body
  7. 17. tubelike structure in the body through which blood flows
  8. 19. means to move it from one place to another
  9. 20. a body fluid that moves materials throughout the body
  10. 21. means done without choice
  11. 22. a gas the body gives off as waste
  12. 23. means a pushing force exerted in every direction
  13. 25. beat caused by the heart contracting,or squeezing,and pushing blood throughout the body
  14. 27. means relating to the heart and blood vessels
  15. 29. the set of organs that function together to move gases into and out of the body
Down
  1. 1. main chamber in the heart that pumps blood to the arteries
  2. 2. means to trade, or give one thing and receive
  3. 3. the exchange of gases between the body and air
  4. 5. means to work for a specific purpose
  5. 7. the clear fluid part of blood
  6. 9. the degree of wellness of the body
  7. 11. the detectable surge in pressure as blood moves through an artery
  8. 12. the combination of foods a person consumes
  9. 15. blood cells tiny structures in blood that carry oxygen to body tissues, at maturity these are simply the cell membrane
  10. 16. means done by choice
  11. 18. refers to things related to life
  12. 22. the process of moving blood throughout parts of the body
  13. 24. is a part of something that is organized for a specific purpose
  14. 26. activity that requires physical effort, done to improve health
  15. 28. the muscular organ that pumps blood through the circulatory system