Across
- 2. Doors in the heart that open and shut controlling blood flow.
- 5. Two lower chambers of the heart.
- 7. A wall separating the left and right sides of the heart.
- 10. Generates an electrical signal that causes the upper heart chambers to contract.
- 12. Decrease in the diameter of a blood vessel.
- 17. A blood vessel that carries blood to the heart.
- 18. Fluid like membrane that surrounds the heart.
- 21. The outermost protective layer of the heart.
- 23. Increase in the diameter of a blood vessel.
- 26. Phase of the heartbeat where the muscles relax filling the chambers up with blood.
- 27. A drug free method to quickly return an abnormal heart rhythm to normal.
Down
- 1. Branches of specialized nerve cells that send electrical signals to the ventricles.
- 3. Conducts the normal electrical impulse from the atria to the ventricles.
- 4. The middle muscular layer of the heart.
- 6. Small blood vessels that carry blood away from the heart.
- 8. The innermost layer of tissue that lines the chambers of the heart.
- 9. The smallest veins that receive blood from capillaries.
- 11. The largest artery in the body, transports blood from the left ventricle..
- 13. Two upper chambers of the heart.
- 14. A test to record the electrical signals in the heart.
- 15. A measure of a fluid's resistance to flow.
- 16. The amount of blood ejected from the ventricle with each cardiac cycle.
- 18. Relating to the lungs.
- 19. Irregular heartbeat.
- 20. Phase of the heartbeat when the heart muscles contract pumping blood out.
- 22. Vessel that transports blood from the heart.
- 24. The slower the heart rate, the greater the cardiac output/more blood pumped.
- 25. One of the two large veins that carries deoxygenated blood to the heart.