What is the role of the cardiovascular system during exercise?

The role of the cardiovascular system during exercise is primarily to deliver oxygen to working muscles. As physical activity increases, the demand for oxygen in the muscles escalates. The cardiovascular system responds by increasing heart rate and stroke volume, which enhances blood flow throughout the body. This process ensures that oxygen-rich blood is efficiently transported to the muscles, allowing them to perform optimally.

Additionally, the cardiovascular system also helps remove metabolic waste products, such as carbon dioxide and lactic acid, which accumulate during intense exercise. This function is vital for maintaining muscle performance and preventing fatigue. Thus, the delivery of oxygen is crucial for endurance, strength, and overall physical capability during exercise.