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Ear wax, SEM
Ear wax. Coloured scanning electron micrograph (SEM) of ear wax (brown) collected on cotton bud fibres (green). Ear wax forms in the ear canal, which runs between the outer ear and the ear drum. Ear wax, or cerumen, is produced by glands in the wall of the ear canal. It prevents the entry of bacteria and foreign objects that could damage the ear. Magnification: x40 when printed at 10 centimetres wide.
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