Final answer:
The name of the duct system located atop the testes where sperm reach maturity is Epididymis. Here, sperm are transported for maturation before they join the semen upon ejaculation D) epididymis.
Step-by-step explanation:
The duct system located atop the testes where sperm reach maturity is called the epididymis (Option D). The epididymis is a coiled tube that collects sperm from the testes and is responsible for their maturation. As the sperm mature, they travel through a series of ducts in the testis leading to the epididymis, ready for the next step. Upon ejaculation, sperm exit the epididymis into the ductus deferens, where they combine with fluids produced by the seminal vesicles and prostate gland to form semen.
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