Final answer:
The vas deferens, which carries mature sperm from the epididymis, passes through the spermatic cord and deposits the semen into the prostatic urethra.
Step-by-step explanation:
The portion of the male reproductive system that passes through the spermatic cord and conducts semen into the prostatic urethra is known as the vas deferens or ductus deferens.
After leaving the epididymis, where sperm maturation occurs, the sperm travel through the vas deferens. The vas deferens then meets with the duct from the seminal vesicles to form the ejaculatory duct.
The ejaculatory duct then empties into the prostatic urethra, where secretions from the prostate gland are added, aiding the transport of sperm through the urethra during ejaculation.