When sperm leave the seminiferous tubules, they are carried through efferent canals to the epididymis, which is a coiled tube found at the posterior edge of the two testicles. It is in the epididymis that sperm acquire mobility. From each epididymis comes a tube called the vas deferens, which leads the sperm to the seminal vesicle. The seminal vesicle corresponds to accessory glands responsible for producing a fluid composed of substances that give energy to sperm.
One of the main substances produced by these glands is fructose. This fluid joins with prostate fluid and sperm to form semen, also called sperm. Upon exiting the seminal vesicle, this fluid is carried to the urethra by a tube called the ejaculatory duct and then released into the urethra. All sperm produced are stored in the epididymis and in the vas deferens until they are eliminated through ejaculation.
