JOHN WALSH / SCIENCE PHOTO LIBRARY JOHN WALSH / SCIENCE PHOTO LIBRARY
Light micrograph of normal human sperm, showing the division between the head (containing the mature male sex cell (male gamete), and the tail which enables sperm to swim during its journey from the vagina through the uterus. Only one spermatozoon succeeds in penetrating & fertilising the female ovum. Magnification: X 400 at 35mm size.
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