The male urethra is divided into prostate, membrane, bulbous and spongy parts, prostate + membrane for the posterior urethra and bulbous + spongy parts for the anterior urethra. 1. Prostate: This is the part of the urethra that passes through the prostate, which is the widest and most dilatable part of the urethra. The urethral ridge is a longitudinal elevation behind this area, and its central elevation is called the caruncle. The caruncle contains the opening of the prostatic vesicle. 2. Membrane: the part of the urethra that passes through the genital diaphragm is about 1.5 cm long, and it is the narrowest part of the urethra. The urethra is surrounded by the urethral crest of the external urethral sphincter, which plays a role in controlling urination. 3. bulbous part: for the male urethral spongy body of the posterior end of the expansion of the part, located on both sides of the penis between the feet, fixed in the urogenital diaphragm below. 4. spongiosum: the part of the urethra that passes through the corpus cavernosum, the longest part of the urethra, 12-17 cm. the spongiosum includes the bulbous part of the urethra, and it is also a vulnerable site for pelvic fracture, and there is an opening for the bulbous glands of the urethra in the area. The urethra is enlarged at the head end of the penis called the navicular fossa. Patients need to consult a doctor for examination and early treatment if they feel unwell.