Across
- 3. delicate blood vessels, smallest blood vessels in your vascular system
- 6. drains deoxygenated blood from the myocardium into the cardiac chambers
- 7. muscle layer of the heart
- 9. red specialized body fluid
- 10. transports O2 to cells,size of fist
- 11. innermost layer of the heart
Down
- 1. relating to the lungs
- 2. largest artery of the body,carries blood from the heart to the circulatory system
- 4. membrane enclosing the heart
- 5. pair of spongy, pinkish-gray organs in your chest
- 6. prevents the backward flow of blood
- 8. supplies blood to the heart muscle