DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Testis. Light micrograph of a transverse section through a testis from a pygmy shrew (Sorex minutus) showing the seminiferous tubules. The seminiferous tubules are the site of sperm production (spermatogenesis). At right is the epididymis (brown), which passes the sperm on to the vas deferens. Magnification: x7 when printed at 10 centimetres tall.
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