The vasa deferentia conduct mature spermatozoa upwards to the urethra, where they are expelled from the reproductive tract by ejaculation during coitus (sexual intercourse). The lumen of the vas deferens is lined with epithelial cells, and is continuous with that of the epididymis and the seminiferous tubules of the testis. The vasa deferentia are normally around 45 cm long, passing up through the spermatic cord, over and around various other organs in the pelvis, before joining the ejaculatory duct and urethra within the body of the prostate gland. The various glands, including the prostate gland, produce secretions that are designed to provide the spermatozoa with the nutrients that they require in order to make their way to an ovum in the female reproductive tract after coitus.