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Urethra

Urethra

P556/0086

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Credit

BO VEISLAND / SCIENCE PHOTO LIBRARY BO VEISLAND / SCIENCE PHOTO LIBRARY

Caption

Urethra. Section through the female urethra, the tube that carries urine from the bladder out of the body. At centre is the lumen, through which the urine travels. It is surrounded by a thin layer of epithelial tissue. The next layer, the largest layer seen, is a spongy erectile tissue (pink) consisting of connective tissue, muscles, blood vessels (red and blue) and mucus-secreting glands (yellow). Mucus protects the epithelium from the corrosive urine. Finally there are 2 layers of muscles, longitudinal (inner) and circular (outer) which contract to push urine out of the body.

Release details

Model release not required. Property release not required.

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