Human prostate gland, light micrograph. The prostate is a small gland found in men just below the bladder, surrounding the urethra, the tube urine passes through. It produces a fluid, in the tubuloalveolar glands (purple), that forms part of the semen. Between the tubuloalveolar glands is a stroma of smooth muscle and connective tissue. Magnification: x250 when printed at 10 centimetres wide.
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