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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Veisland, Bo |
Bildgröße: | 2820 px × 2998 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |