Systems

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Across
  1. 3. muscle
  2. 6. one cycle of contraction and relaxation of the
  3. 9. process of taking in and giving out air
  4. 10. gas that is essential to all living things for survival
  5. 11. water-carrying tubes
  6. 12. water-carrying tubes carry water and mineral salts from the _____ to the other parts of the plant
  7. 15. liquid that transports oxygen around our body
  8. 17. Found in the lungs, covered with a rich supply of blood vessels that increases surface area for gaseous exchange
  9. 18. fishes take in dissolved oxygen through their _____
  10. 19. reaction in the cells that produces energy from oxygen and nutrients
Down
  1. 1. plants produce this gas when they make their own food via photosynthesis
  2. 2. strong muscular organ that pumps blood all the time
  3. 4. type of blood vessel that carries deoxygenated blood from all parts of our body to the heart
  4. 5. type of blood vessel that exchanges materials with our cells
  5. 7. food-carrying tubes
  6. 8. type of blood vessel that carries oxygenated blood from the heart to all parts of our body
  7. 13. tiny openings found mainly on the underside of the leaves
  8. 14. most abundant gas in the air
  9. 16. food-carrying tubes transport food (glucose) made in the _____ to the other parts of the plant