Sweat pores. Coloured scanning
electron micrograph (SEM) of sweat (light blue) produced by
sweat pores on skin from a human hand. Sweat is released onto
the surface of the skin from glands below the surface. The sweat
evaporates, and this cools the body by carrying away heat. The
surrounding areas shows the dead cells making up the surface
layer of the skin, the stratum corneum.