Across
- 2. largest artery in the body
- 5. shape of a red blood cells
- 6. carries oxygenated blood from the lungs into the heart
- 7. liquid part of the blood that carries dissolved nutrients
- 9. blood vessel only one cell thick
- 10. blood vessel with thick muscular wall and tiny lumen
- 11. prevent blood flowing backwards
- 13. red pigment in red blood cells
- 14. the part of the heart with the thickest wall
- 15. causes an increase in heart rate
Down
- 1. part of the blood that fights infection
- 3. type of blood cells that carries oxygen
- 4. part of the blood responsible for clotting
- 6. the blood vessel which carries blood from the heart to the lungs
- 8. the blood vessel which carries deoxygenated blood into the heart
- 12. muscular wall separates the left and right side of the heart