Cardiovascular System Crossword

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Across
  1. 2. air sacs in the lungs where oxygen and carbon dioxide are exchanged
  2. 4. either one of the hearts upper chambers
  3. 5. transmits blood nutrients and oxygen to cells in your organs
  4. 7. the largest artery in the body and the man vessel to supply blood from the heart
  5. 8. a pair of spongy air-filled organs located on either sides of the chest
  6. 9. happens when a part of the heart muscle doesn't get enough blood
  7. 10. The muscle that beats in your chest and pumps blood throughout the body
Down
  1. 1. carries oxygenated blood from the heart to all the body parts
  2. 3. carries oxygen depleted blood toward the heart
  3. 4. the valve that regulates blood flow from the heart into the aorta
  4. 6. when the heart stops beating suddenly