DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Skin. Light micrograph of a section through skin that has been stained with osmium. The outer most layer of skin is the stratum corneum (dark brown), it is part of the epidermis and consists of dead cells that act as a protective barrier. Beneath the epidermis is the dermis (light brown), a thick layer of connective tissue. Anchored in the dermis are sweat glands (brown tubes) and hair follicles containing hair shafts (black rods). At the bottom is the hypodermis, which contains adipose (fat) cells (black). Magnification: x5 when printed at 10 centimetres wide.
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