Artery
Arteries are blood vessels that carry oxygen-rich blood away from the heart to the tissues of the body. They are a crucial part of the circulatory system. Here's a brief overview:
Structure:
Tunica Intima: The innermost layer, which is smooth to reduce friction as blood flows through.
Tunica Media: The middle layer, consisting of smooth muscle and elastic tissue, allowing the artery to withstand high pressure and regulate blood flow by constricting or dilating.
Tunica Externa: The outer layer, composed of connective tissue, providing structural support and protection.
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