Cardiovascular Puzze

5. Lower tip of the heart.
7. largest type of blood vessel; carries blood away from the heart to all parts of the body. Notice that artery and away begin with an “a.”
8. Relaxation phase of the heartbeat. (From Greek diastole, dilation)
9. smallest type of blood vessel. Materials pass to and from the bloodstream through the thin capillary walls.
10. largest artery in the body.
12. Two common carotid arteries located on each side of the neck branch from the aorta and provide blood to head, neck and brain. The word carotid comes from a Greek word meaning stupor because pressure on these arteries produced unconsciousness.
14. Inner lining of the heart.
15. Record of the electrical activity of the heart. The electricity is represented by waves or deﬂ ections called P, QRS, or T.

1. Blood that is oxygen-poor.
2. Specialized tissue in the wall between the atria. Electrical impulses pass from the pacemaker (SA node) through the AV node and the atrioventricular bundle or bundle of His toward the ventricles.
3. small artery.
4. Specialized muscle ﬁbers connecting the atria with the ventricles and transmitting electrical impulses between them. His is pronounced “hiss.”
6. Gas (waste) released by body cells, transported via veins to the heart, and then to the lungs for exhalation.
11. Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.
13. One of two upper chambers of the heart.