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Sperm, SEM

Sperm, SEM

P624/0203

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Credit

STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY

Caption

Sperm. Coloured scanning electron micrograph (SEM) of sperm (spermatozoa) in the epididymis. Sperm cells are the male sex cells. They are produced in the testes and are responsible for fertilisation of the female ovum (egg). The epididymis is a long convoluted tube connecting the testes to the vas deferens. Seen also are the stereocilia (projections), which are structures that aid in absorption of the excess fluid in the epididymis. Here the sperm start to become motile and no longer need the fluid for propulsion.

Release details

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