Circulatory System

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Across
  1. 5. blood vessels that deliver O2
  2. 6. dividing wall between the left and right side of the heart
  3. 7. largest artery in the body
  4. 10. disk shaped cells
Down
  1. 1. proteins that help blood clots
  2. 2. an organ that pumps blood
  3. 3. two large veins that return blood
  4. 4. one of the phases of the cardiac cycle
  5. 8. body fluid
  6. 9. upper chamber of the heart