Cardiovascular System

7. a reduced core body temperature below 35 °C
8. the two lower chambers of the heart
9. blood vessels that carry deoxygenated blood and waste products from the body’s cells back to the heart
10. one-way valves that control blood flow within capillaries
12. a process whereby blood vessels narrow or constrict, causing a decrease in blood flow
14. the arteries and veins that feed blood from the heart to the whole body and back to the heart again for reoxygenation
15. pooling a collection of blood in the leg veins when high-intensity activity stops too suddenly
18. tiny blood vessels in the cardiovascular system between the ends of the arterioles and the venules.
20. a process whereby blood vessels increase their diameter, causing an increase in blood flow
21. a rise in the body’s core temperature above 37.5–38.3 °C

1. the difference between the concentration of oxygen in the arterial blood and the concentration of oxygen in the blood in the veins.
2. the maintenance of core body temperature within a narrow range
3. the arteries that supply oxygen and nutrients to the cardiac muscle
4. large, thick-walled blood vessels that carry blood away from the heart
5. the arteries and veins that feed blood from the heart to and from the lungs where blood is oxygenated
6. the two upper chambers of the heart
7. one contraction and relaxation of the heart muscle
11. the amount of blood ejected from the left ventricle of the heart per minute.
13. the blood pressure recorded as blood is ejected during the contraction phase of the heart cycle.
16. a relaxation of the heart muscle
17. a constant internal environment for optimal functioning of the body and its systems
19. the amount of blood ejected from the left ventricle with each heartbeat (contraction) of the heart.