Medical Vocabulary

4. One of the two upper receiving chambers of the heart.
6. One of the two lower pumping chambers of the heart.
7. The rhythmic expansion and recoil of an artery caused by the beating of the heart.
9. Full name of the diagnostic tracing of the heart's electrical signals.
11. The thick, muscular middle layer of the heart wall responsible for pumping action.
14. A blood vessel that returns blood toward the heart
17. Relating to the heart and blood vessels.
18. A blood vessel that carries blood away from the heart.
20. The passage of fluid (such as blood) through the circulatory system or lymphatic system to an organ or tissue.

1. The phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers.
2. The phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood.
3. CYCLE The complete sequence of events in a single heartbeat, including contraction and relaxation.
5. PRESSURE The lateral force exerted by circulating blood against the walls of blood vessels.
8. A spatial view of the heart's electrical activity recorded by specific electrode placements.
10. The body's largest artery, carrying oxygenated blood from the left ventricle to the body.
12. The transmission of electrical impulses through the heart muscle to trigger contraction
13. RATE The number of heartbeats per unit of time, typically expressed as beats per minute (BPM).
15. Abbreviation for a test that records the electrical activity of the heart.
16. A specialized tissue mass (like the SA or AV node) that acts as a pacemaker or signal relay in heart conduction.
19. The smallest type of blood vessel where gas, nutrient, and waste exchange occurs.