Respiratory and circulatory system

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Across
  1. 3. Liquid that transports substances such as oxygen and nutrients.
  2. 5. this made up the largest percentage in air
  3. 7. Process where plants make food
  4. 9. this is transported from roots to all parts of the plant
  5. 10. Organs that take in oxygen and remove carbon dioxide in humans.
  6. 11. Mostly found on underside of the leaves, allow loss of water
  7. 13. Organ that pumps blood around the body.
  8. 16. Process that gives us energy
Down
  1. 1. Waste gas produced during respiration.
  2. 2. Carry air from nose tolungs
  3. 4. This is transported from the leaves to all parts of the plant
  4. 6. Gas needed by cells for respiration.
  5. 8. Structures that allow fish to obtain oxygen from water.
  6. 12. Found in the lungs
  7. 14. All body ____ needs oxygen and digested food
  8. 15. this filters dust from inhaled air