Cardiovascular System

2. Pressure This occurs when the Semilunar valves close.
4. Circulation System of blood vessels that carry blood to and from the lungs for gas exchange.
6. Divides the right and left side of the heart.
9. This is where oxygen is passed into cells and waste into the blood.
13. Points to the left and rests on the diaphragm.
14. Circulation System that carries oxygen-rich blood
15. Prevents blood from flowing back into the left atrium after it entered the aorta.
18. Atrium Receives oxygen-poor blood from the superior and inferior Vena Cava.
22. Fluid filled sac.
23. These have thicker walls to withstand pressure when the heart contracts to push blood throughout the body.
26. Valve Prevents backflow of blood into the right atrium.
28. Vena Cava Returns oxygen-poor blood to the right atrium from the lower regions
29. Brings oxygen-rich blood from the left ventricle to the body.
32. Points Another name for pulse points.
33. Ventricle Pumps blood received from the right atrium to the lungs

1. Node This Node is called the pacemaker.
3. Rate This can be measured in beats per minute.
5. Outer layer of the wall of the heart.
7. Bundle Another name for this is the Bundle of his.
8. The great vessels of the body emerge from here.
10. Branches These are located in the interventricular septum.
11. Lines heart chambers and helps blood flow smoothly.
12. These contain one-way valves that keep blood flowing toward the heart.
16. Conduction System Nodal System
17. Middle layer that contracts.
19. Valves These prevent backflow of blood in the heart.
20. Cycle The events of one heartbeat when both the atria and ventricles contract and relax.
21. Prevents blood from flowing back into the left ventricle after it has entered the aorta.
24. Vena Cava Returns oxygen-poor blood to the right atrium from the upper regions.
25. Pressure-Pressure Blood exerting against the inner walls of the blood vessels and that force keeps the blood circulating continuously.
27. Atrium Receives oxygenated blood from the pulmonary veins.
30. Fibers Fibers located in the muscle of ventricle walls.
31. Pressure Pressure when the ventricles contract and push out blood.