Across
- 2. This is also called the S-A node or sinus node. This starts the impulses that stimulate the heartbeat.
- 3. A measurement of heart electrical activity.
- 8. Membrane around the heart.
- 9. This carries blood from the heart to the arteries.
- 10. Chamber in your heart that forces blood into the ventricles.
- 11. This prevents blood from going back into the right atrium. Has 3 flaps.
Down
- 1. Muscular/elastic-filled blood vessels.
- 2. This returns blood to the right atrium and is the second largest vein.
- 4. A study of the heart and it's systems.
- 5. This prevents blood from going back into the left ventricle.
- 6. This returns blood to the right atrium and is the largest vein.
- 7. This prevents blood from going back into the left ventium. Has 2 flaps.
- 12. Stage of the heart cycle when the heart muscle contracts.