BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY BIOPHOTO ASSOCIATES / SCIENCE PHOTO LIBRARY
Light micrograph of a section through a prostate gland. The prostate is a large male gland that surrounds the neck of the bladder and the urethra (the tube that carries both urine and semen out of the body). The prostate produces an alkaline secretion that forms part of the seminal fluid, and also produces secretions that keep the lining of the urethra moist.
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