Urethral sphincter

The Musculus urethra ( from Latin musculus " muscle ", from Greek ouréthra " urethra "; " urethral muscle ") is a striated muscle of the urethra ( urethra ). In male mammals surround circularly the urethra in female muscle arises from the side of the vagina and forms a loop around the urethra. In humans, it is divided into the deep transverse perineal muscle and the external urethral sphincter actual sphincter urethrae membranaceae.

The Musculus urethral sphincter acts as a counter to the urine sample, so used the Harnhaltevermögen ( continence ). He is particularly active in the phases of increased intra-abdominal pressure. In addition, the muscle makes rhythmic contractions for further transport of the sperm during ejaculation.

The innervation carried by the pudendal nerve.

• Urinary organ
• Striated muscles
• Urethra