Why is a high capillary supply advantageous for muscles during exercise?

A high capillary supply in muscles is advantageous during exercise because it enhances blood flow and oxygen delivery to the active tissues. This means that during physical activity, the muscles require increased oxygen to meet the heightened metabolic demands. A dense network of capillaries ensures that oxygen can be efficiently transported from the bloodstream to the muscle fibers where it is needed for aerobic metabolism.

Moreover, an extensive capillary network allows for the rapid exchange of not only oxygen but also other essential nutrients and waste products. This improved oxygen delivery is crucial for maintaining energy production and sustaining muscle performance during prolonged or intense exercise. Additionally, the increased blood flow helps in the removal of metabolic byproducts such as carbon dioxide and lactic acid, which can contribute to muscle fatigue if not cleared efficiently.

In summary, the advantage of having a high capillary supply lies in its role in enhancing oxygen delivery and overall nutrient supply to working muscles, thereby supporting optimal exercise performance and efficiency.