Human Sperm Tails, TEM

Human Sperm Tails, TEM

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Credit: David M. Phillips/SCIENCE PHOTO LIBRARY

Caption: Colour enhanced transmission electron microscope of a cross section of human spermatozoa. A sperm's tail's ability to move is partly due to the arrangement of microtubules (part of the cell's cytoskeleton) 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 fibers, which provide rigidity and protection to the tail. Next is a layer of mitochondria which provide the energy for movement. Finally the tail is wrapped in a protective outer sheath.

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Keywords: anatomy, axoneme, biological, biology, central, colorized, cross section, dense, double, electron micrograph, enhanced, fibers, flagella, flagellum, gamete, male reproductive system, many, micrograph, micrography, microtubule, microtubules, mitochondria, mitochondrion, multiple, pl. spermatozoa, reproduction, sectioned, sex cell, sheath, sperm, sperm cell, sperm cross section, sperm tail, spermatozoa, spermatozoan, spermatozoon or spermatozoan, tail, tem, transmission electron micrograph

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