Arteries how many

The left anterior descending artery branches off the left coronary artery and supplies blood to the front of the left side of the heart. The circumflex artery branches off the left coronary artery and encircles the heart muscle. This artery supplies blood to the outer side and back of the heart. Right coronary artery RCA. The right coronary artery supplies blood to the right ventricle, the right atrium, and the SA sinoatrial and AV atrioventricular nodes, which regulate the heart rhythm.

The right coronary artery divides into smaller branches, including the right posterior descending artery and the acute marginal artery. Together with the left anterior descending artery, the right coronary artery helps supply blood to the middle or septum of the heart. Smaller branches of the coronary arteries include: obtuse marginal OM , septal perforator SP , and diagonals. You will probably recognize the main arteries in the human body: the aorta the main artery coming out of the heart coronary arteries in the heart the carotid artery in the neck.

However, there are more than 20 major arteries throughout the body, which then branch out into many, many smaller arterioles and capillaries. This extensive network carries blood to all parts of the body. Each artery is made up of three layers: a smooth layer on the inside a thick layer of muscle in the middle a rough layer on the outside.

Update my browser now. Your heart pumps blood to carry oxygen and nutrients to every organ and muscle in your body. Your heart needs its own supply of blood, too. The vessels that supply oxygen-rich blood to your heart are called coronary arteries.