Goose feather, SEM

Goose feather, SEM

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Caption: Goose feather, coloured scanning electron micrograph (SEM). The central shaft, or rachis runs from upper right to lower left. Rows of filaments, known as barbs, project from either side of the rachis. Along the length of each barb are smaller filaments, known as barbules. The closely packed barbules insulate the bird. Magnification: x17 when printed at 10 centimetres tall.

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Keywords: anatomy, animal body, barb, barbs, barbules, biological, biology, bird, black-and-white, coloured, down, downy, false-coloured, fauna, feather, feathers, goose, insulation, monochrome, nature, rachis, scanning electron micrograph, scanning electron microscope, sem, shaft, structure, zoological, zoology

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