The skin performs many functions including: ​ (a)   against injury, sun damage, and infection; ​ (b)   by dissipating or retaining heat through capillary dilation or constriction; and ​ (c)   as urea and uric acid are released with sweat.

The skin performs many functions including: ​ ​ (a)   due to the presence of merkel cells; ​ (b)   for fat, glucose, and water; and it serves as a ​ (c)   to prevent evaporation.

The skin performs many functions including: ​ ​ (a)   due to the presence of merkel cells; ​ (b)   for fat, glucose, and water; and it serves as a ​ (c)   to prevent evaporation.

The skin performs many functions including: ​ ​ ​ (a)   which makes transdermal medications possible and ​ (b)   which is activated by the sun.

When the skin is working to regulate temperature, blood vessels ​ (a)   to release excess heat and ​ (b)   to retain heat.

In addition to dilating and constricting blood vessels, the skin also regulates temperature through evaporation of perspiration by the ​ (a)   glands.

The dermis, which is also called the ​ (a)   or "true skin", has a ​ (b)   layer which forms the fingerprints and a ​ (c)   layer which contains the blood vessels, nerves, hair follicles, and sweat and oil glands.