Circulatory System Review

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