PATHOLOGY

Detailed explanation-1: -[3] There are four pulmonary veins. Pairs of two emerge from each of the hila of the lungs. The left superior pulmonary vein drains the left upper lobe and the lingula. The left inferior pulmonary vein drains the left lower lobe.

Detailed explanation-2: -Generally, four pulmonary veins drain blood from the lung and deliver it to the left atrium of the heart.

Detailed explanation-3: -You have one main pulmonary artery, also known as your pulmonary trunk. This artery directly connects with your heart at your pulmonary valve. This is the “door” that controls blood flow out of your lower right heart chamber (right ventricle).

Detailed explanation-4: -The pulmonary veins, four in number, open into the upper part of the posterior surface of the left atrium-two on either side of its middle line: they are not provided with valves.