Which part of the male reproductive system stores sperm?

The vas deferens is the structure responsible for storing sperm. This tube extends from the epididymis, where sperm matures, to the ejaculatory duct, and it serves as a passageway for sperm during the reproductive process. In addition to transportation, the vas deferens holds sperm until ejaculation occurs, making it crucial for sperm storage.

The testicle is primarily involved in the production of sperm and hormones rather than storage. The scrotum helps maintain the optimal temperature for sperm production but doesn't store sperm itself. The bladder, on the other hand, is part of the urinary system and does not play a role in the male reproductive system in terms of sperm storage or production. Understanding the specific functions of these structures clarifies why the vas deferens is the correct choice.