Cardiovascular System

1. the amount of blood ejected from the left ventricle with each heartbeat (contraction) of the
4. a constant internal environment for optimal functioning of the body and its systems
5. blood vessels that carry deoxygenated blood and waste products from the body’s cells back to the heart
9. a relaxation of the heart muscle
11. large thick-walled blood vessels that carry blood away from the heart
13. the arteries that supply oxygen and nutrients to the cardiac muscle (heart)
14. output, the amount of blood ejected from the left ventricle of the heart per minute.
18. the blood pressure recorded as blood is ejected during the contraction phase of the
20. a process whereby blood vessels narrow or constrict causing a decrease in blood flow
21. one contraction and relaxation of the heart muscle

2. a collection of blood in the leg veins when high-intensity activity stops too suddenly
3. the maintenance of core body temperature within a narrow range
5. the two lower chambers of the heart.
6. the arteries and veins that feed blood from the heart to the whole body and back to the
7. a reduced core body temperature below 35 °C
8. tiny blood vessels in the cardiovascular system between the ends of the arterioles and the venules.
10. the difference between the concentration of oxygen in the arterial blood and the concentration of oxygen in the blood in the veins.
11. the two upper chambers of the heart.
12. one-way valves that control blood flow within capillaries
15. a process whereby blood vessels increase their diameter causing an increase in blood flow
16. cycle.
17. again for reoxygenation
19. a rise in the body’s core temperature above 37.5–38.3 °C