The urethra: a small channel with big responsibilities

The urethra is a structure that is often overlooked, but it plays a fundamental role in our body. It is the duct that connects the bladder to the outside of the body, allowing urine to be expelled. We all have one, but its shape, length and function vary greatly between men and women.

In women, the urethra is short and straight, about 3-4 centimetres long. It opens in the vulvar vestibule, between the clitoris and the vaginal entrance. Its function is exclusively urinary: it serves only to eliminate urine. Because of its shortness, however, it is more susceptible to infections, such as cystitis, because bacteria can more easily travel up to the bladder.

In men, on the other hand, the urethra is much longer, about 18-20 centimetres, and has a dual function: in addition to transporting urine, it is also the channel through which sperm passes during ejaculation. This makes it an integral part of both the urinary and reproductive systems.

The male urethra: anatomy and functions

The male urethra begins in the bladder, passes through the prostate, the Pelvic floor and runs along the entire penis, until it opens at the tip of the glans. It is divided into several tracts: the prostatic tract, which receives the ejaculatory ducts; the membranous tract, which passes through the sphincter muscle; and the spongiosus tract, which runs along the penis and is protected by an erectile tissue called the corpus spongiosum.

During urination, the urethra transports urine to the outside. During ejaculation, on the other hand, it carries sperm, which comes from the testicles and mixes with the seminal fluid produced by the prostate and seminal vesicles. These two functions are regulated by very precise muscular and nervous mechanisms, which prevent, for example, urine and sperm from mixing.

When the male urethra becomes diseased

Like any part of the body, the urethra can also experience problems. One of the most common is the’urethritis, an inflammation often caused by sexually transmitted infections such as gonorrhoea or chlamydia. Symptoms include burning during urination, discharge and pain.

Another frequent condition is the urethral stenosis, the narrowing of the urethral canal. It can be caused by trauma, chronic infections or invasive medical interventions, such as catheterisation. Stenosis makes it difficult to urinate and can cause urinary retention and recurrent infections.

There are also congenital malformations, such as hypospadias, in which the opening of the urethra is not at the tip of the penis but in a more backward position. In some cases, urethral diverticula, small sacs that obstruct urinary flow and promote infections, can form.

Finally, although rare, there are also tumours of the urethra, which can manifest themselves with blood in the urine, pain or difficulty urinating.

Caring for the urethra

Pain, burning, blood in the urine, difficulty urinating or alterations in ejaculation are signs that should not be ignored. A urological check-up can help to identify the cause and intervene promptly.

The urethra, despite being a small channel, has a huge impact on the quality of life. Knowing it better means taking care of your health in a conscious way.

The link between urethra and prostate

The prostate surrounds the first tract of the urethra, what is called the prostatic urethra.

This section of the urethra runs vertically through the gland, from base to apex, and is where secretions from the ejaculatory ducts collect. These secretions constitute a fundamental part of the seminal fluid, which is responsible for nourishing and protecting the spermatozoa. During ejaculation, the prostate contracts and pushes the seminal fluid into the urethra, where it joins the spermatozoa from the testicles and is then expelled outside.

But the prostate has not only a reproductive role. It is also involved in the regulation of urinary flow. At the entrance and exit of the prostatic urethra are two sphincters: an internal one, which prevents the involuntary release of urine, and an external one, which allows urination only when necessary. These muscles work in synergy with the prostate musculature, providing precise control of both urination and ejaculation.

When the prostate becomes enlarged, it can compress the urethra and obstruct urinary flow. This is one of the reasons why many men, especially after the age of 50, begin to experience symptoms such as difficulty urinating, frequent need to go to the bathroom, or a feeling of incomplete bladder emptying.

In short, the urethra and the prostate are intimately connected: the former runs through the latter, and together they regulate two vital functions, urinary and sexual. When the prostate becomes diseased, the urethra is directly affected, which is why many prostate diseases manifest themselves as urinary disorders.

Wikipedia - Urethra