Final answer:
In the circulatory system, the cross-sectional area and pressure are inversely related. As the total cross-sectional area increases, the pressure decreases. This is because when blood flows from larger vessels to smaller vessels, such as from the arteries to the capillaries, the total cross-sectional area increases.
Step-by-step explanation:
In the circulatory system, the cross-sectional area and pressure are inversely related. As the total cross-sectional area increases, the pressure decreases. This is because when blood flows from larger vessels to smaller vessels, such as from the arteries to the capillaries, the total cross-sectional area increases. This branching and increase in area reduces resistance and allows for a slower velocity of blood flow, resulting in reduced pressure.