PATHOLOGY

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: -Normal anatomy consists of four pulmonary veins in number, two for each lung and opened individually into the left atrium. The right superior pulmonary vein drains blood from right superior and right middle lobes.

Detailed explanation-3: -There are 2 phases to your heart’s pumping cycle: systole – this is when your heart contracts, pushing blood out of the chambers. diastole – this is the period between contractions when the muscle of your heart (myocardium) relaxes and the chambers fill with blood.