Sperm Tails, TEM

Sperm Tails, TEM

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Credit: David M. Phillips/SCIENCE PHOTO LIBRARY

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Caption: Colour enhanced transmission electron micrograph (TEM) of cross sections through sperm tails of a rat. 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: axoneme, biological, biology, central, colorized, cross section, double, electron micrograph, enhanced, flagella, flagellum, gamete, healthy, histology, male reproductive system, many, micrograph, micrography, microscopy, microtubule, microtubules, mitochondria, mitochondrion, normal, paired, rat, reproduction, rodent, sex cell, sheath, single, sperm, spermatozoa, spermatozoan, tail, tem, transmission electron micrograph

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