heart crossword

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Across
  1. 2. makes up the thick middle layer of the heart
  2. 5. The two upper chambers of the heart they help blood pass through the heart
  3. 8. A large vein that carries blood to the heart from other areas of the body
  4. 11. Muscular chamber that pumps blood out of the heart and into the circulatory system
Down
  1. 1. creates your heartbeat
  2. 3. A wall separating the right and left sides of the heart
  3. 4. Prevents the backward flow of blood
  4. 6. Blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart
  5. 7. Delicate blood vessels that deliver nutrients and oxygen to cells throughout your body
  6. 9. the main vessel through which oxygen-rich blood travels from the heart to the rest of the body
  7. 10. A blood vessel that carries blood from the heart to tissues and organs in the body