The main function of the coronary arteries is to supply oxygenated blood to the heart muscle itself. These arteries branch off from the aorta and encircle the heart, providing essential nutrients and oxygen required for the heart to function effectively. They play a critical role in maintaining the health and efficiency of the heart, facilitating its pumping action. Blockage or narrowing of these arteries can lead to serious conditions such as angina or myocardial infarction (heart attack), highlighting the importance of maintaining coronary artery health as part of overall cardiovascular wellness.