What is the primary function of the vasa deferentia?

The vasa deferentia, also known as ductus deferens, primarily serve the function of transporting sperm from the epididymis to the ejaculatory duct during ejaculation. This muscular tube undergoes peristaltic contractions to help propel sperm forward during the reproductive process, making its role essential in male fertility.

The other options do not align with the primary function of the vasa deferentia. For example, while the urinary system is responsible for transporting urine, this is not a function of the vasa deferentia. Additionally, although sperm storage occurs in the epididymis, the vasa deferentia do not serve this purpose directly. Hormonal secretion is primarily a function of the endocrine glands, rather than the vasa deferentia. Thus, the correct answer highlights the primary role of the vasa deferentia in the male reproductive system.