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Human sperm cell, SEM

Human sperm cell, SEM

P624/0139

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Credit

MANFRED KAGE / SCIENCE PHOTO LIBRARY MANFRED KAGE / SCIENCE PHOTO LIBRARY

Caption

Sperm cell. Coloured scanning electron micrograph (SEM) of the head (lower left) and tail of a human sperm cell or spermatozoon. This tiny male sex cell is produced in the testes, and is responsible for fertilisation of the female egg (ovum). It has a rounded head which contains the male hereditary material (DNA), and a long tail that it uses to propel itself. Some 300 million sperm are released by the male during ejaculation, while the female usually releases one egg at a time. Only one sperm cell can fertilise the egg. Magnification unknown.

Release details

Model release not required. Property release not required.

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