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Ch. 11 - The Cardiovascular System
Across
2. Amount of blood pumped out of a ventricle in one minute.
7. System of blood vessels that carry blood to and from the lungs for gas exchange.
8. Layer of the heart wall composed of cardiac muscle.
10. A heart rate over 100 beats per minute.
13. Modified cardiac muscle fibers of the conduction system of the heart.
14. Blood vessels that return blood toward the heart from the circulation.
15. Period of the cardiac cycle when either the ventricles or the atria are relaxing.
16. A measure of the amount of friction encountered by blood as it flows through the blood vessels.
17. System of blood vessels that carries nutrient and oxygen-rich blood to all body organs.
Down
1. A heart rate below 60 beats per minute.
3. Double-layered serosa enclosing the heart and forming its superficial layer.
4. Specialized myocardial cells in the wall of the right atrium; pacemaker of the heart.
5. Amount of blood pumped out of a ventricle during one contraction.
6. Narrowing of blood vessels.
9. Vessels that carry blood away from the heart.
11. The smallest of the blood vessels and the sites of exchange between the blood and tissue cells.
12. Substance released by the kidneys that is involved with raising blood pressure.