Sperm tails, TEM

Sperm tails, TEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Sperm tails. Transmission electron micrograph (TEM) of sections through the tails of sperm (spermatozoa) cells at various levels. A sperm's tail's ability to move is partly due to the arrangement of microtubules (red central dots) 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, which provide rigidity and protection to the tail. Next is a layer of mitochondria (green) which provide the energy for movement. Finally the tail is wrapped in a protective outer sheath. Magnification: x45,000 when printed 10 centimetres wide.

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Keywords: accessory, anatomical, anatomy, axoneme, biological, biology, cell biology, central, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, cytological, cytology, dense, fibre, fibres, flagella, flagellum, gamete, gametes, healthy, male, microtubule, microtubules, mitochondria, mitochondrion, normal, reproduction, reproductive, section, sectioned, sections, sex cell, sheath, sperm, spermatozoa, spermatozoan, spermatozoon, tail, tails, tem, transmission electron micrograph, transmission electron microscope, white background

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