cardiovascular systems crossword puzzle

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Across
  1. 3. Cava two in humans that carry blood into heart
  2. 7. colorless cell
  3. 9. muscular tissue of the heart
  4. 12. disc without nucleus
  5. 13. Artery carries blood from the right ventricle to the lungs
  6. 15. carries deoxygenated blood into the heart
Down
  1. 1. main artery of the body
  2. 2. the membrane inclosing the heart
  3. 4. where blood gets passed to the ventricles
  4. 5. vein carries oxygenated blood to left atrium
  5. 6. a cavity in a organ
  6. 8. another term for something that starts with p
  7. 10. form a network between venules are arterioles
  8. 11. lines the inside of the heart
  9. 14. carries oxygenated blood out of the heart