Spongy urethra

Spongy Urethra

The Spongy Urethra (also known as the penile urethra) is the final section of the urethra, a tube that conveys urine from the bladder to the exterior of the body. The spongy urethra extends from the termination of the membranous urethra to the external urethral orifice at the tip of the penis.

Etymology

The term "spongy urethra" is derived from its location within the spongy (or cavernous) body of the penis. The word "urethra" comes from the Greek "ourethra" which means "a channel for conveying urine."

Anatomy

The spongy urethra is approximately 15 cm long, making it the longest part of the male urethra. It is encased within the corpus spongiosum, a mass of erectile tissue that surrounds the urethra. The spongy urethra begins at the level of the perineal membrane and extends to the external urethral orifice.

Function

The primary function of the spongy urethra is to transport urine from the bladder to the outside of the body. In addition to this, it also serves as a conduit for semen during ejaculation.

Clinical Significance

Due to its length and location, the spongy urethra is the most common site of urethral injuries. These can occur as a result of trauma, such as a straddle injury, or from medical procedures like catheterization. Infections of the urethra, known as urethritis, can also affect the spongy urethra.

Related Terms

• Urethra
• Membranous urethra
• Prostatic urethra
• Urethritis
• Corpus spongiosum

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