Reindeer hair, SEM

Reindeer hair, SEM

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Caption: Reindeer hair. Coloured scanning electron micrograph (SEM) showing the structure of hairs from a reindeer (Rangifer tarandus). The reindeer coat has two layers of fur, a dense woolly undercoat (thin hairs) and a longer-haired overcoat consisting of hollow, air-filled hairs (larger hairs). This helps it to keep warm in the extreme cold of its holarctic habitat. The outside of the hair, the cuticle, is covered in overlapping scales of dead cells containing the protein keratin. Magnification: x110 when printed 10 centimetres wide.

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Keywords: air-filled, animal, animal body, arctic, biological, biology, caribou, cold, coloured, cuticle, dead, deer, domestic, false-coloured, fauna, hair, hairs, hairy, holarctic, hollow, keratin, layer, mammal, nature, overlapping, protein, rangifer tarandus, reindeer, ruminant, scale, scales, scanning electron micrograph, scanning electron microscope, sem, subartic, thick, thin, two layers, wildlife, zoological, zoology

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