resistance vessels

Resistance vessels are small blood vessels, primarily arterioles, that play a crucial role in regulating blood flow and blood pressure in the body. They constrict or dilate in response to various signals, controlling the amount of blood that can pass through them. This regulation helps direct blood to where it is needed most, such as during physical activity or in response to temperature changes. By adjusting their diameter, resistance vessels ensure that organs and tissues receive an adequate supply of oxygen and nutrients while maintaining overall cardiovascular stability.