"A heart attack occurs when blood flow to part of the heart muscle is blocked, causing permanent damage to the heart muscle . T or F

True

Explanation:

"A heart attack occurs when one or more of your coronary arteries becomes blocked. Over time, a buildup of fatty deposits, including cholesterol, form substances called plaques, which can narrow the arteries (atherosclerosis)."

and : "A heart attack, or myocardial infarction (MI), is permanent damage to the heart muscle."

b) the heart is a pump made of muscle and that is difficult to grow in the lab.