Pre-prostatic urethra

Diagram of the male urethra, showing the pre-prostatic urethra at the top.

The pre-prostatic urethra is a segment of the male urethra that is located between the bladder and the prostatic urethra. It is a short section that plays a crucial role in the passage of urine from the bladder to the outside of the body.

Anatomy

The pre-prostatic urethra is approximately 0.5 to 1.5 cm in length and is situated at the base of the bladder. It is surrounded by the internal urethral sphincter, a smooth muscle that helps control the release of urine. This segment of the urethra is also known as the intramural urethra because it is embedded within the wall of the bladder.

Function

The primary function of the pre-prostatic urethra is to serve as a conduit for urine. It also plays a role in preventing the backflow of urine into the bladder during ejaculation, as the internal urethral sphincter contracts to close off the bladder.

Clinical Significance

Disorders of the pre-prostatic urethra can lead to urinary problems. Conditions such as urethral stricture or benign prostatic hyperplasia can affect the flow of urine through this segment. Understanding the anatomy and function of the pre-prostatic urethra is important for diagnosing and treating such conditions.

Related Pages

• Urethra
• Prostatic urethra
• Bladder
• Urethral sphincter