MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY
Scalp section. Light micrograph of hair follicles (pale brown, elongated) in a section through the skin of the scalp. Numerous sebaceous glands (pale brown globular structures) are also seen. These secrete waterproofing sebum onto the hairs. Hairs are shafts of the protein keratin. They grow from bulbs at the bases of the follicles. The skin comprises several distinct layers. The epidermis (brown, top) consists of dead skin cells. These are constantly sloughed off and replaced from below. Beneath the epidermis is the dermis (red), which contains blood vessels and nerves (not seen). A fatty subcutaneous layer (white) lies beneath the dermis. Magnification unknown.
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