What is the main function of the pulmonary circuit?

The primary function of the pulmonary circuit is to transport deoxygenated blood from the right side of the heart to the lungs, where carbon dioxide is exchanged for oxygen. This process begins when the right ventricle pumps deoxygenated blood into the pulmonary arteries, which carry the blood to the lungs. In the lungs, the blood picks up oxygen during respiration and releases carbon dioxide, a waste product of cellular metabolism.

Once this gas exchange occurs, the now oxygenated blood returns to the left side of the heart via the pulmonary veins. From there, the oxygen-rich blood is distributed throughout the body to supply tissues and organs with the necessary oxygen for cellular function.

This sequence of events highlights the importance of the pulmonary circuit in ensuring that the body receives a fresh supply of oxygen while effectively removing carbon dioxide, thus playing a crucial role in sustaining life.