Urethra: Anatomy

Specifically, the urethra is a tube from the bladder neck to the urethral meatus, that is to say the hole allowing the flow of urine (and semen in men). The average diameter of urethra is about 10 mm.

In women, this tube is short (about 3 to 4 cm or less), right, and its opening is at the level of the vulva, specifically between the clitoris and the vaginal opening.

In humans, this duct is about 10 to 12 cm and consists of three parts mentioned above. The posterior urethra is about 4 cm and follows the bladder neck surrounded by the prostate. This part of the urethra is also called prostatic urethra, below which there are the urethral sphincter allows continence (urine retention according to the will). It is in the prostatic urethra as the ejaculatory ducts are open and prostatic ducts that allow the passage of sperm. The other two parts are the anterior urethra, along with about 8 to 10 cm in the periphery and including the corpus spongiosum and corpora cavernosa. It is also this part of the urethra that passes through the scrotum and penis and the glans finally to arrive at the urethral meatus.