Which structure is primarily responsible for sperm storage and maturation?

The epididymis is the structure primarily responsible for the storage and maturation of sperm. This coiled tube is located at the back of each testis and serves as the site where immature sperm produced in the testes undergo a maturation process. Sperm gain motility and learn to swim during their transit through the epididymis, which can take several days.

In addition to storage, the epididymis also provides an environment for the development of sperm so that they can be properly prepared for ejaculation. Once the sperm have matured in the epididymis, they are transported to the vas deferens during ejaculation.

While the testes are where sperm are produced and the vas deferens is involved in transporting sperm away from the epididymis, neither of these structures is primarily responsible for the maturation process as specifically as the epididymis. The urethra, on the other hand, serves as a conduit for urine and semen but is not involved in sperm maturation or storage.