Circulatory System Review

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Across
  1. 4. What is the lower chamber of the heart called?
  2. 8. What is the upper chamber of the heart called?
  3. 9. A muscular wall that separates the heart into the left and right side.
  4. 10. Oxygen lacking blood enters the heart through the vena cava and moves into the _____.
  5. 11. ______ carry blood to the heart.
  6. 12. When blood is separated, it forms _____ layers.
Down
  1. 1. The ______ artery carries blood from the right ventricle to the lungs.
  2. 2. _____ keep blood from flowing backwards in the heart.
  3. 3. The _____ powers the entire circulatory system.
  4. 5. The smallest of vessels; where the exchange of gas, nutrients and waste occurs.
  5. 6. This valve is located between the left atrium and left ventricle.
  6. 7. Blood leaves the left ventricle through the _____.
  7. 8. _____ carry blood away from the heart.