This exhibit displays the equation for Poiseuille's Law along the top. Using x3 panels showing a close-up cross-section of a vessel extending from the heart, this demonstrates 1) normal circumference, normal pressure, and normal flow, 2) reduced circumference by 1/2, normal pressure, and reduced flow to 1/16th, and 3) reduced circumference by 1/2, increased pressure x16, and normal flow. The pressure is represented with a pressure valve and the flow represented by a speedometer.