Resistance in the cardiovascular system

A) tends to increase if blood viscosity increases.
B) tends to decrease as the diameter of blood vessels decreases.
C) dramatically increases blood flow through the circulatory system.
D) is directly related to flow (↑ R → ↑ Flow) .
E) does not occur. If it did, blood would not circulate in the blood vessels.

Blood Viscosity

A measure of the resistance of blood to flow, influenced by the composition of blood and affecting its ability to circulate through the vessels.

Cardiovascular System

The cardiovascular system comprises the heart and blood vessels, functioning to circulate blood throughout the body, delivering oxygen and nutrients while removing waste products.