Circulatory System

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Across
  1. 3. Blood vessels that carry blood away from heart (8 letters)
  2. 5. Upper chambers of the heart (5 letters)
  3. 6. Largest artery in the body (5 letters)
  4. 7. Liquid component of blood (6 letters)
  5. 8. Blood vessels that return blood to heart (5 letters)
Down
  1. 1. Blood cells that fight infection (5 letters)
  2. 2. Lower chambers of the heart (10 letters)
  3. 4. Tiny blood vessels for gas exchange (11 letters)