sciencephotolibrary:

Epididymis. Coloured scanning electron micrograph (SEM) of a freeze fracture through the epididymis. Immature sperm (green) are seen in the tubule lumen. Also seen are stereocilia (hair-like structures), which aid in the absorption of excess fluid. Magnification: x1750 when printed at 10 centimetres wide.
Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

sciencephotolibrary:

Epididymis. Coloured scanning electron micrograph (SEM) of a freeze fracture through the epididymis. Immature sperm (green) are seen in the tubule lumen. Also seen are stereocilia (hair-like structures), which aid in the absorption of excess fluid. Magnification: x1750 when printed at 10 centimetres wide.

Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY