What is the function of pulmonary veins?

The function of pulmonary veins is to return oxygenated blood to the heart. After the blood is oxygenated in the lungs, it travels back to the left atrium of the heart through the pulmonary veins. This process is crucial because it allows the heart to pump the oxygen-rich blood throughout the body via the systemic circulation.

Understanding the role of pulmonary veins highlights their importance in the overall circulatory system. By transporting blood that has picked up oxygen from the lungs, these veins ensure that the tissues and organs receive the essential oxygen they need for metabolism and cellular function.