Across
- 1. has a left and a right section in the lower half of the heart
- 3. blood vessel carrying blood to the heart
- 4. another name for a platelet
- 8. innermost layer of tissue that lines the chambers of the heart
- 9. the bodys largest artery
- 11. middle layer of the hearts wall composed of cardiac muscle tissue
- 12. transports deoxygenated blood the heart to the lungs
Down
- 2. smallest blood vessels
- 3. largest vein in the heart and body
- 5. also known as white blood cells
- 6. carries oxygenated blood from the lungs to the heart
- 7. fluid-filled sac that surrounds and protects the heart
- 9. has a left and a right section on the upper half of the heart
- 10. also known as red blood cells