Across
- 3. A tough, saclike membrane surrounding the heart
- 4. The blood pressure in the arteries during a heart beat
- 6. Oxygen carrying molecule found in RBCs
- 9. The blood cells that fight infection
- 11. The part of the brain that controls heart rate
- 13. The machine that measures electrical impulses in the heart
- 14. A disease characterized by the build up of fatty materials in the coronary arteries
Down
- 1. The amount of blood the heart pumps each minute
- 2. This is the biggest artery in the body
- 3. These cause the ventricles to contract
- 5. Blood vessels that connect arteries to veins
- 7. Structure in the heart that divides it into 2 sides
- 8. The part of the blood that is made up of mostly water
- 10. The only veins that carry deoxygenated blood
- 12. The semilunar valve on the left side of the heart