The Function of the Skin DERMIS As the main body of the skin, the dermis is often known as the true skin. It is formed from areolar connective tissue and contains many vital structures, including circulatory vessels, nerves, two types of glands – sebaceous and sweat glands – and tiny involuntary muscles (arrector pili muscles) together with the hair and hair follicle. The bulk of the dermis is known as the reticular layer. It contains protein fibers – collagen, elastin, and reticulin- contributing to the skin’s resilience, elasticity, and strength. The reticular section of the dermis also contains a host of specialized cells, including: Fibroblasts produce areolar tissue, collagen, elastin, and reticulin fibers. Phagocytic cells – which help to defend the body by destroying bacterial invaders Mast cells produce histamine when the skin is damaged or irritated, allowing more blood to flow to the area for assistance.
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