STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Urinary bladder epithelium. Coloured scanning electron micrograph (SEM) of the folded inner surface of a healthy human bladder. The folds enable the bladder to deal with the large changes in the volume of urine that occur as it fills and empties. Magnification: x30 at 6x7cm size.
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