Chapter 21, Problem 2CP

Summary Introduction

To determine:

The type of vessel characterized by thin walls with very little smooth muscle tissue in the tunica media.

Introduction:

The type of the vessel characterized by thin walls with very thin walls and smooth muscle tissue in the tunica media are the veins. These veins drain the blood into the venules, which form a capillary network of the blood vessels. The diameter of the veins range from $\text{2mm}\text{-}\text{9mm }\left(\text{millimeter}\right)$ in thickness.