HUMAN CIRCULATORY SYSTEM

123456789
Across
  1. 4. Largest artery in the body
  2. 5. Organ that pumps blood
  3. 6. System that drains fluid along with circulatory system
  4. 9. Valve between right atrium and ventricle
Down
  1. 1. Number of chambers in a human heart
  2. 2. Fluid part of blood that carries nutrients and hormones
  3. 3. Ensures one-way blood flow in heart
  4. 5. Oxygen-carrying protein in red blood cells
  5. 7. Prevents excessive bleeding
  6. 8. Low WBC count weakens _______