Final answer:
The epididymis is a coiled duct that sits atop each testis, responsible for the storage, transport, and maturation of the sperm cells. The immature sperm cells that originated from the seminiferous tubules within the testis mature and evolve into motile spermatozoa within the epididymis and are stored in the tail portion.
Step-by-step explanation:
The coiled duct that sits atop each testis and is responsible for the storage, transport, and maturation of the spermatozoa is referred to as the epididymis. From the seminiferous tubules within the testis, immature sperm cells get transported to the epididymis, where they undergo a maturation process. As the sperm cells move through the coiled tubes of the epididymis, they evolve into mature and motile spermatozoa that have the ability to fertilize an ovum (egg cell).
In its coiled state, the epididymis does not occupy a large space. However, if it were to be uncoiled, it would almost be about 6 meters (approximately 20 feet) in length. It's in the tail region of the epididymis where the mature sperm are stored, waiting for ejaculation to take place.
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