Biology

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Across
  1. 2. blood vessel that transports blood away from the heart
  2. 4. blood vessel that carries blood back to the heart
  3. 5. The passages that direct air into the lungs
  4. 8. a cell fragment that plays an important part in forming scabs
  5. 10. Filters waste from the blood like urea, water, salt and proteins
  6. 11. help fight disease
  7. 13. Blood cells that carry oxygen from the lungs to the body cells
  8. 14. where digestion begins
Down
  1. 1. absobs water
  2. 3. An organ that exchanges oxygen and carbon dioxide with the blood
  3. 4. lower chamber of the heart
  4. 6. large muscular sac that continues the mechanical and chemical digestion of food
  5. 7. smallest blood vessel; connect vein and artery
  6. 9. The basic unit of structure and function in living things
  7. 12. liquid part of the blood