Cardiovascular Puzzle

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Across
  1. 3. Makes sure blood doesn't flow backward
  2. 7. Vessels thinner than arteries
  3. 10. Artery to head and neck
  4. 12. Full of oxygen
  5. 13. cavae Two large, oxygen-deficient veins
  6. 14. Heart beat
  7. 15. Carries deoxygenated blood toward the heart
Down
  1. 1. Microscopic vessels
  2. 2. veins veins that carry oxygenated blood.
  3. 4. Innermost layer of arteries
  4. 5. Carry blood away from the heart
  5. 6. Largest artery
  6. 8. dioxide Passes out of a cell when oxygen goes in
  7. 9. artery Divided vessel leading to lungs
  8. 11. Blood filled with waste travels through these