MEDICAL PHYSIOLOGY

Detailed explanation-1: -The pulmonary circulation has many essential functions. Its primary function involves the exchange of gases across the alveolar membrane which ultimately supplies oxygenated blood to the rest of the body and eliminates carbon dioxide from the circulation.

Detailed explanation-2: -Complete answer: Pulmonary circulation is the blood circulation pathway in which deoxygenated blood is moved out of the heart and sent to the lungs and then after oxygenation, blood is returned back to the heart for further systemic circulation.

Detailed explanation-3: -This deoxygenated blood is pumped into the lungs from the pulmonary valve. In the lungs, the deoxygenated blood is purified into oxygenated blood where the carbon dioxide is released. Finally, the oxygenated blood return to the heart through pulmonary veins where it is pumped all over the body.

Detailed explanation-4: -During inspiration, the expansion of the lungs increases pulmonary blood volume, which transiently decreases the flow of blood from the lungs to the left side of the heart. In contrast, during expiration, lung deflation causes flow to increase from the lungs to the left atrium.