Yes, the urethra passes directly through the prostate gland. In males, the prostate wraps around the urethra like a donut, and the segment running through it is called the prostatic urethra. This anatomical relationship is the reason prostate problems so often cause urinary symptoms.
How the Urethra Runs Through the Prostate
The urethra exits the bladder and immediately enters the prostate, which sits just below it. The prostate’s tissue surrounds the urethra in layers, sometimes described as resembling an onion. The innermost layer, called the transition zone, makes up only about 10% of the prostate’s tissue and directly encircles the urethra between the bladder and the upper third of the tube.
The prostatic urethra is a shared channel for both urine and semen. Small ducts from the prostate gland empty into this segment, adding prostatic fluid to semen during ejaculation. So this short stretch of tubing serves double duty: it carries urine out of the bladder during urination and transports semen during sex. No other segment of the urethra plays this dual role.
Why This Arrangement Causes Problems
Because the prostate completely encircles the urethra, any change in prostate size directly affects urine flow. The most common example is benign prostatic hyperplasia (BPH), where the prostate gradually enlarges with age. As extra tissue grows inward, it physically compresses the urethra and narrows the channel. On top of that compression, increased muscle tension in the prostate tissue can tighten around the urethra even further. Both mechanisms increase resistance to urine flow at the bladder outlet.
The result is a collection of symptoms that many men over 50 will recognize:
- Trouble starting your urine stream
- A flow that starts and stops or feels very slow
- Frequent urination, especially at night
- Feeling like your bladder is still partially full after you finish
- An urgent, sudden need to urinate
- Pain or discomfort while urinating
These symptoms all trace back to one structural fact: the urethra has no way around the prostate, so when the prostate swells, the urethra gets squeezed.
How Surgeons Use This Anatomy
The urethra’s path through the prostate also creates a natural access route for treatment. In a procedure called transurethral resection of the prostate (TURP), a thin instrument is inserted through the tip of the penis, threaded up the urethra, and guided into the prostate area. The surgeon uses this tool to see and trim away excess prostate tissue that’s blocking urine flow. No incisions are made on the outside of the body. The entire procedure happens through the urethra itself.
This approach works precisely because the urethra runs through the center of the prostate. The surgeon is essentially working from the inside out, removing tissue that has been pressing inward on the urethral channel.
Why Catheterization Can Be Tricky
The prostate-urethra relationship also explains why inserting a urinary catheter can be more difficult in men, especially those with an enlarged prostate. The catheter has to pass through the prostatic urethra, and if the prostate has grown significantly, it can create a narrowed or angled passage that the catheter struggles to navigate.
In practice, men with prostate enlargement sometimes need a slightly larger catheter (to prevent kinking inside the prostatic urethra) or a curved-tip catheter designed to negotiate the angle created by an enlarged gland. The curved tip helps the catheter ride over ridges of prostate tissue that a standard straight catheter might get caught on. In some facilities, catheters with built-in cameras now allow direct visualization of the urethra while the tube is being placed.
The Female Urethra Is Different
This anatomy is unique to males. The female urethra is much shorter and doesn’t pass through a prostate gland, which is one reason urinary obstruction from organ enlargement is far less common in women. The entire concept of a prostatic urethra applies only to male anatomy, and it’s the key to understanding why prostate health and urinary health are so tightly connected in men.