Across
- 2. Abnormal swishing sound caused by improper closure of the heart valves
- 3. Small vein.
- 11. 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.”
- 12. Instrument to measure blood pressure.
- 13. Thin-walled vessel that carries blood from body tissues and lungs back to the heart. Veins contain valves to prevent backflow of blood.
- 14. Relaxation phase of the heartbeat. (From Greek diastole, dilation)
- 15. Muscular middle layer of the heart.
Down
- 1. Beat of the heart as felt through the walls of the arteries.
- 4. Innermost lining of blood vessels.
- 5. Contraction phase of the heartbeat. (From Greek systole, contraction.)
- 6. One of two lower chambers of the heart.
- 7. Specialized nervous tissue in the right atrium that begins the heartbeat. An artificial cardiac pacemaker is an electronic apparatus implanted in the chest to stimulate heart muscle that is weak and not functioning.
- 8. Gas that enters the blood through the lungs and travels to the heart to be pumped via arteries to all body cells
- 9. Structure in veins or in the heart that temporarily closes an opening so that blood flows in only one direction.
- 10. Partition or wall dividing a cavity; such as between the right and left atria (interatrial septum) and right and left ventricles (interventricular septum).