Good coronary circulation select one: a. strengthens heart valves by moving more blood through the heart. b. nourishes the heart and reduces the risk of a heart attack. c. to prevent blood pooling in the lower extremities. d. increases blood pressure in the heart.

Good coronary circulation nourishes the heart and reduces the risk of a heart attack. Coronary arteries supply blood to the myocardium and other components of the heart. They originate from the left side of the heart at the base of the aorta. The heart muscles needs oxygen-rich blood to be able to carry out its functions. 

In my own word cell technology can  lead to advances in the understanding of diseases mechanism and transmission because diseases is very bad