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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Veisland, Bo |
Taille de l’image : | 2820 px × 2998 px |
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Property Release : | Non requis |
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