Final answer:
Sperm leave the male's body through the urethra during ejaculation. The sperm travel from the epididymis through the vas deferens, where they mix with fluids to form seminal fluid before being ejaculated out of the body.
Step-by-step explanation:
The sperm leave the male's body through a specific pathway. Initially, the sperm develop flagella and mature in the epididymis, which is a coiled tube adjacent to the testes. From the epididymis, the mature sperm are propelled into the vas deferens, a muscular tube that transports the sperm from the epididymis to behind the bladder, where it joins with the duct from the seminal vesicles to form the ejaculatory duct.
During ejaculation, strong contractions propel the sperm from the epididymis through the vas deferens. The sperm pass by the prostate and other glands, mixing with fluids from these glands to form seminal fluid. The seminal fluid, containing the sperm, is finally ejaculated through the urethra and leaves the body via the phallus. An average ejaculation can contain hundreds of millions of sperm cells.
It's important to note that a procedure called a vasectomy involves the removal of a section of the vas deferens, thereby preventing the passage of sperm out of the body, which is a method of male contraception.