Essay On Coronary Arteries

Coronary arteries are one of the most important parts of the body because of many different factors. Heart muscle needs blood rich in oxygen to function and pump more blood throughout the circulatory system. If the blood does not carry enough oxygen, the veins will carry it away. Blood can only be delivered when the heart is relaxed; because once they contract they become narrow. These arteries are structured differently as opposed to many of the other arteries in the human body. The coronary arteries are bound on the outside of the heart walls and have specific sections that submerge into the heart muscle to bring its blood into. These arteries are structured differently as opposed to many of the other arteries in the human body. They have a spherical lumen …show more content…
This artery branches off into both interventricular arteries in about 15% of people. In about 4% of people, a single artery can supply the entire heart. The right coronary artery branches into the right marginal artery and the posterior interventricular artery, both of which supply blood to the right side of the heart, which diverts it to the lungs through a process, called coronary circulation. The right marginal artery brings blood to the lateral portion of the myocardium. While, the posterior interventricular artery goes to the apex of the heart and mainly serves the posterior ventricular walls. Once it begins to get closer to the apex, it will converge into the anterior interventricular arteries, which are a part of the left coronary arteries. These arteries mostly run across the underside of the heart, also supplying blood to the bottom portion of the left ventricle and the posterior portion of the septum. The coronary arteries anastomose many times which allows for many routes for blood delivery. Once the blood passes through the capillary beds of the myocardium, cardiac veins then collect the venous