Through which space does the membranous part of the male urethra traverse?

Through which space does the membranous part of the male urethra traverse?

• A. Deep perineal pouch
• B. Superficial perineal space
• C. Retropubic space
• D. Pelvic cavity

Answer: (A)

The membranous part of the male urethra passes through the deep perineal pouch (deep perineal space) as it traverses the urogenital diaphragm. This short segment runs through the fibromuscular boundary of the perineal membrane and is surrounded by the external urethral sphincter, which lies in the deep pouch along with other structures like the bulbourethral glands in males. The deep perineal pouch is the space between the superior fascia of the urogenital diaphragm and the perineal membrane, and it specifically accommodates the membranous urethra as it transitions from prostatic to penile urethra. In contrast, the superficial perineal space lies superficial to the perineal membrane and contains structures such as the bulb and superficial transverse perineal muscles, not the membranous urethra; the retropubic space and the pelvic cavity are regions outside this perineal route.

The membranous part of the male urethra passes through the deep perineal pouch (deep perineal space) as it traverses the urogenital diaphragm. This short segment runs through the fibromuscular boundary of the perineal membrane and is surrounded by the external urethral sphincter, which lies in the deep pouch along with other structures like the bulbourethral glands in males. The deep perineal pouch is the space between the superior fascia of the urogenital diaphragm and the perineal membrane, and it specifically accommodates the membranous urethra as it transitions from prostatic to penile urethra. In contrast, the superficial perineal space lies superficial to the perineal membrane and contains structures such as the bulb and superficial transverse perineal muscles, not the membranous urethra; the retropubic space and the pelvic cavity are regions outside this perineal route.