What are the four different parts of the male urethra?

The male urethra is divided into four parts: the prostatic urethra, which runs through the prostate gland; the membranous urethra, the shortest segment that passes through the urogenital diaphragm; the spongy (or penile) urethra, which runs through the penis and is surrounded by erectile tissue; and the external urethral orifice, where urine and semen are expelled from the body. Each segment has distinct anatomical features and functions.