circulatory System crossword

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Across
  1. 2. Yellowish fluid part of blood
  2. 4. Upper heart chamber
  3. 7. Largest artery in the body
  4. 8. Organ that pumps blood
  5. 9. Lower heart chamber
  6. 10. Vessels that return blood to the heart
Down
  1. 1. Tiny vessels where exchange happens
  2. 3. Vessels that carry blood away from the heart
  3. 5. Help blood clot
  4. 6. Gas carried by red blood cells