systems

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Across
  1. 1. - a chemical that comes from proteins
  2. 3. - a hollow, muscular organ that pumps blood throughout the body
  3. 8. - small tube where urine leaves the body
  4. 10. - filtering factories in the kidneys that remove wastes from blood and produce urine
  5. 11. - remove urea and other waste from blood while keeping important materials
  6. 13. - two upper chambers receives blood
  7. 14. - two lower chambers pump blood out of the heart
Down
  1. 1. - 2 narrow tubes that bring urine from the kidneys
  2. 2. - carry blood away from heart
  3. 4. - carbon dioxide is removes when you exhale
  4. 5. - regulate the amount of water in the body
  5. 6. - blood from the arteries come here to exchange substances with cells
  6. 7. - carry blood to heart
  7. 9. bladder - muscular organ that stores urine
  8. 12. - separate atria and ventricles