One of the most serious diseases of the cardiovascular system is atherosclerosis,in which
A) the pressure of the blood is higher than normal, substantially increasing the risk of heart attack.
B) heavy deposits of plaque containing cholesterol and fats collect on the walls of the main arteries.
C) the heart beats too fast, too slow, or with an irregular rhythm, causing a lack of blood flow to the organs.
D) an obstruction or spasm of the coronary arteries causes ischemia of the heart muscle.
Correct Answer:
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