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