SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Skin surface comparison. Coloured 3-D light micrograph comparing the skin of a 6-year-old (top) with that of a 43-year-old (bottom). The outermost surface is composed of dead and dying skin cells from the underlying epidermis, which help to protect the delicate epidermal cells from the external environment. A sweat gland filled with sweat (lower left) and an empty (dry) sweat gland (lower centre) can be seen on the older skin. Magnification x25 when printed 10 centimetres wide.
Model release not required. Property release not required.