ANATOMY

Detailed explanation-1: -Your pulmonary arteries are blood vessels that carry oxygen-poor blood from the right side of your heart to your lungs.

Detailed explanation-2: -The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium. From the left atrium blood flows into the left ventricle.

Detailed explanation-3: -The right side of the heart receives blood that is low in oxygen because most has been used up by the brain and body. It pumps this to your lungs, where it picks up a fresh supply of oxygen. The blood then returns to the left side of the heart, ready to be pumped back out to the brain and the rest of your body.

Detailed explanation-4: -Oxygen-rich blood travels from your lungs to your left atrium through large veins called pulmonary veins. Your mitral valve opens to send blood from your left atrium to your left ventricle.

Detailed explanation-5: -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.