London, United Kingdom
Sperm Cells, Sem
Photograph - Photograph
Sperm cells. Coloured scanning electron micrograph (SEM) of sperm cells (spermatozoa) in the testis. Each sperm cell consists of a head (round), which contains the genetic material that fertilises the female egg cell, and a tail (blue), which propels the sperm.
May 1st, 2013
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