The epididymis runs into which duct?

The epididymis is a highly coiled tube that serves as a storage and maturation site for sperm produced in the testes. After the sperm are matured and stored within the epididymis, they are transported into the ductus deferens, which is also known as the vas deferens. This duct continues the pathway for sperm during ejaculation.

The ductus deferens runs from the epididymis, passing through the spermatic cord and ultimately connecting to the ejaculatory duct, where sperm combines with seminal fluid to form semen before entering the urethra. This anatomical relationship is critical in male reproductive physiology, demonstrating how sperm travels from its production site to its eventual expulsion during ejaculation.

The other options provided refer to structures that are either unrelated to the immediate continuation from the epididymis or serve different functions in the male reproductive tract. The seminal duct and prostatic duct do not directly connect to the epididymis; rather, they are involved in other aspects of the reproductive process. The urethra, while it carries urine and semen, is not directly the duct that follows the epididymis. Therefore, the ductus deferens is the correct structure that runs from the epididymis.