What is the primary function of the cardiovascular system during exercise?

The primary function of the cardiovascular system during exercise is to deliver oxygen and nutrients to working muscles. As physical activity increases, the muscles require more oxygen to produce the energy needed for sustained movement. The cardiovascular system, which includes the heart, blood vessels, and blood, plays a critical role in facilitating this process.

When exercise begins, the heart rate and stroke volume increase, pumping more oxygenated blood to the muscles. Additionally, the system helps transport nutrients such as glucose and fatty acids, which are essential for energy production, to the active tissues. The efficiency of this delivery system is crucial for overall performance and endurance during exercise.

Other functions of the cardiovascular system, such as maintaining body temperature and facilitating metabolic waste removal, are important but secondary to the primary role of providing oxygen and nutrients during physical activity.