Blood Vessel Basics

Outer layer composed of areolar connective tissue used for support and protection

Tunica Externa

Middle layer of smooth muscle that controls the diameter of the vessel

Tunica Media

Inner layer of simple squamous endothelium that reduces friction

Tunica Intima

What is Tunica Externa composed of

Areolar connective tissue

What is Tunica Media composed of

Smooth muscle

What is Tunica Intima composed of

Simple squamous endothelium

Which blood vessel has to deal with the highest pressure

Arteries

In which blood vessel is the pressure so low that one way valves are necessary to prevent backflow of blood

Veins

Which blood vessels show vasoconstriction the best

Arteries

Which layer of tunica is responsible for vasoconstriction

Tunica media

Do capillaries have a higher pressure than veins

Yes