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54.3 MB (5.9 MB compressed)
4572 x 4150 pixels
38.6 x 35.1 cm ⏐ 15.2 x 13.8 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Human prostate, coloured scanning electron micrograph (SEM) of a section through the prostate. The prostate is a small gland found only in men. It's about the size of a walnut and gets a little bigger with age. The prostate produces a thick, white fluid that mixes with the sperm produced by the testicles to make semen. It also produces a protein called prostate-specific antigen (PSA) that turns the semen into liquid. The pseudostratified columnar epithelium (purple) is covered in microvilli (small hair-like projections). Magnification: x 1000 when printed at 10 centimetres wide.
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