Tunica media is the layer of blood vessels that are most responsible for maintaining blood pressure.
Blood vessels are the conduits that transport blood throughout your body. They form a closed loop, similar to a circuit, that starts and stops at your heart. The circulatory system is made up of the heart vessels and blood vessels. There are approximately 60,000 miles of blood veins in your body.
The tunica intima, tunica media, and tunica adventitia are the three layers of blood vessels. Learn about the mechanics of vasoconstriction and vasodilation as well as the architecture and functions of these three layers.
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