False col. SEM of a sweat pore on human scalp

False col. SEM of a sweat pore on human scalp

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Credit: DAVID SCHARF/SCIENCE PHOTO LIBRARY

Caption: False-colour scanning electron micrograph of a sweat pore on the human scalp. Sweat glands are small structures deep in the dermis of the skin, made up of a coiled tube, and opening at the surface in a pore (as seen here). This is an eccrine sweat gland. The other type of apocrine sweat gland opens into a hair follicle, rather than directly on the surface like this one. Cells on the surface are epidermal, and some dead cells are peeling off. Sweat secreted from this gland consists mainly of water, 99%, with some dissolved substances (including salt). Sweat helps keep the body cool. The average person has about 3 million sweat glands. Magnification: x126 at 35mm size.

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Keywords: anatomy, human body, scalp, skin, surface, sweat gland

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