THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -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. The left ventricle pumps the blood to the aorta which will distribute the oxygenated blood to all parts of the body.

Detailed explanation-2: -The left coronary artery delivers blood to the left side of your heart, including your left atrium and ventricle and the septum between the ventricles. The circumflex artery branches off from the left coronary artery to supply blood to part of the left ventricle.