Across
- 3. A muscle that pumps blood throughout the body.:
- 4. The largest blood vessel in the body; it carries oxygen-rich blood from the heart to the body.
- 5. Blood vessels that return de-oxygenated blood back to the heart.
- 8. The liquid component of blood in which the blood cells are suspended.
- 11. These cells help fight infections and aid in the immune process.
- 12. A blood vessel where blood flows away from the heart; usually delivers oxygen-rich blood.
Down
- 1. The continuous flow of blood through the heart and blood vessels.
- 2. These cells carry oxygen from the lungs to the rest of the body.
- 6. These help in blood clotting.
- 7. The smallest blood vessels; they are the sites where oxygen and nutrients are transferred to tissues and waste is collected.
- 9. The upper chambers of the heart that receive blood entering the heart.
- 10. The lower chambers of the heart that pump blood out of the heart.