Multiple Cholce Questlon What layer of the blood vessel wall is composed of endothelium and a subendothelial layer of areolar connective tissue? O Tunica intima media O Tunica externa (b) Need heln? Review these concent resources.

The layer you're asking about is the tunica intima, which is the innermost layer of the blood vessel wall. It consists of a smooth endothelium that lines the lumen, providing a barrier between the blood and the vessel wall, as well as a thin subendothelial layer of areolar connective tissue that supports the endothelium and allows for some flexibility and elasticity. Understanding the structure of blood vessels is not just academic – it plays a key role in various medical fields. For example, knowledge of the tunica intima is crucial in understanding how conditions like atherosclerosis develop, where plaque builds up in this layer, leading to narrowed arteries and increased cardiovascular risk. Keeping this in mind can help in both prevention and treatment strategies!