Explanation Blood flow through a vessel varies directly with the resistance to flow and length of the vessel. The resistance is in inverse relation with the fourth power of the radius of the vessel. For example, if viscosity is increased two fold then the resistance to flow is increased two fold. Hence, the smaller vessels pose more resistance to blood flow compared to larger vessels. Vasoconstriction and vasodilation lead to movement of blood from one organ to the other...

15th Edition

ISBN: 9781259864629

Author: Fox, Stuart Ira

Publisher: Mcgraw-hill Education,

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Question

Chapter 14, Problem 6bCP

Summary Introduction

To review:

The following:

Relationship between vascular resistance and radius of the vessel

The diversion of blood flow from one organ to another.

Introduction:

Blood makes the entery into the heart via two large veins namely the superior vena cava and inferior vena cava. These veins pour oxygen-poor blood from the body into the right atrium. The vessels pose resistance to the flow of blood. The blood flows at the highest rate within the arteries. The resistance to blood flow varies in different organs hence the cardiac output also differs.

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Chapter 14, Problem 6aCP

Chapter 14, Problem 7aCP

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Chapter 14 Solutions

Human Physiology

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Solution Summary: The author explains the relationship between vascular resistance and radius of the vessel. Vasoconstriction and vasodilation lead to movement of blood from one organ to the other.

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