What is the main function of the systemic circulatory system?

The main function of the systemic circulatory system is to supply oxygenated blood to the body. This system begins with oxygen-rich blood being pumped from the left side of the heart into the aorta, which then branches out to deliver oxygen and nutrients to various tissues and organs. As the blood circulates through the body, it exchanges oxygen for carbon dioxide and other waste products in the tissues. This process is crucial for maintaining cellular function and overall body health.

While gas exchange primarily occurs in the lungs, which is the function of the pulmonary circulatory system, the systemic circulatory system is specifically responsible for delivering the oxygenated blood obtained from the lungs to the body. The other options reflect different functions that are either part of other systems or are secondary processes, but supplying oxygenated blood is the fundamental role of the systemic circulation.