Across
- 1. white blood cells
- 3. disk shaped
- 6. the large, Middle part of the heart muscle
- 10. a blood vessel that carries oxygen-rich blood from the lungs back to the heart
- 12. a double-layered sac that surrounds the heart and its root
- 14. the smallest blood vessel in the body
- 15. a chamber in the heart that receives blood from the body or lungs and pumps it into ventricle
Down
- 2. the innermost layer of the heart
- 4. transport blood under very high pressure
- 5. the largest blood vessel in the body
- 7. a muscular chamber that pumps blood out of the heart and into the circulatory system
- 8. help to clot blood
- 9. a major blood vessel that carries deoxygenated blood from the hearts right ventricle to the lungs for oxygenation
- 11. a large vein that carries blood to the heart from other areas of the body
- 13. carry deoxygenated blood away from capillaries to the heart