microvascular resistance

Microvascular resistance refers to the resistance to blood flow within the small blood vessels, called capillaries and arterioles, that supply blood to tissues. It determines how easily blood can pass through these tiny vessels; higher resistance means more difficulty, which can impair oxygen delivery, while lower resistance allows smoother flow. This resistance is influenced by vessel diameter, flexibility, and blood viscosity. Proper regulation of microvascular resistance is crucial for maintaining tissue health and function, especially during changes in activity or in certain health conditions.