Which of the following is NOT a function of the coronary arteries?

The coronary arteries are primarily responsible for supplying oxygenated blood to the heart muscle itself, ensuring that the myocardial tissues receive adequate oxygen and nutrients to function effectively. They also play a part in maintaining the heart’s oxygen supply and can help in removing waste products from the heart through the venous return, but they are not responsible for storing blood.

The correct choice points out that storing blood for emergency use is not a function of the coronary arteries. Instead, blood reservoir functions are usually performed by certain blood vessels and organs, such as veins and the spleen, which can hold and release blood as needed. In contrast, the coronary arteries focus on supplying blood directly to the heart in real-time, which is crucial for maintaining its pumping efficiency and overall health.