Urethra

• Male Urethra: 
  • 18-20 cm long. Long compared to female urethra
  • From bladder to external meatus in the penis
  • Prostatic part:
    • Contained within prostate. Encircled by prostate prostate  as it leaves bladder
    • Widest part 
    • It is about 3 cm long
  • Membranous part:
    • Where the urethra pierces  the perineal membrane.
    • Shortest part - it is about 2.5 cm
    • Narrow
  • Spongiosa part:
    • Contained in the penis
    • 15 cm long
    • Uniform diameter 6 mm
• Female Urethra: 
  • 4 cm long. 6 mm diameter
  • Short compared to male urethra
  • It begins in the urethral orifice of the bladder and runs embedded in the anterior wall of the vagina.

Applied Anatomy