Across
- 3. infarction technical term for heart attack
- 4. veins These take carbon dioxide and other waste material from the heart muscles to the heart
- 5. semilunar valve Controls blood entering the lungs
- 7. single cell thick vessels that connect the arterial and venous system
- 9. A hollow organ made up of cardiac muscle
- 10. Fibers Branches of nerves from the Bundle of His
- 12. Thin walled tubes that allow the body to return de-oxygenated blood from the body to the heart
- 13. Blood flow through the tissues is called
Down
- 1. systole Atrial contraction is called
- 2. arteries supply the heart muscles with oxygen and nutrients
- 3. middle and thickest layer; made up of cardiac muscle
- 5. Establishes the basic rhythm of the heart
- 6. De-Oxygenated blood flows from this and into the right atrium
- 8. semilunar valve Controls blood entering the arterial system
- 11. Oxygenated blood leaves the heart by the