biology

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Across
  1. 5. causes breathing difficulties
  2. 6. healthier complex sugars
  3. 9. helps stop bleeding
  4. 10. certain food people eat
  5. 11. pigment that make blood red
  6. 13. final structure of membrane proteins
  7. 15. most important gas for animals
Down
  1. 1. Fights diseases
  2. 2. responsible for breathing
  3. 3. process that creates energy
  4. 4. is in 45% of blood
  5. 7. common sugar molecules in bread
  6. 8. helps with gas exchange
  7. 12. fluid that transports oxygen
  8. 14. ________ used to repair bones/muscles