Sperm tails, TEM

Sperm tails, TEM

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Caption: Sperm tails. Coloured transmission electron micrograph (TEM) of cross sections through sperm tails. A sperm's tail's ability to move is partly due to the arrangement of microtubules (part of the cell's cytoskeleton, purple rings) within the tail. The microtubules are arranged in a central axoneme with two central single microtubules and nine peripheral double microtubules. Surrounding the microtubules are dense fibres (purple, solid), which provide rigidity and protection to the tail. Next is a layer of mitochondria (brown) which provide the energy for movement. Finally the tail is wrapped in a protective outer sheath (yellow). Magnification: x20,000 when printed 10 centimetres wide.

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Keywords: accessory, anatomy, axoneme, biological, biology, central, coloured, cross section, dense, double, false-colour, false-coloured, fibres, flagella, flagellum, gamete, healthy, male reproductive system, many, microtubule, microtubules, mitochondria, mitochondrion, multiple, normal, paired, reproduction, sectioned, sex cell, sheath, single, sperm, spermatozoa, spermatozoan, tail, tem, transmission electron micrograph, transmission electron microscope

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