Now what the seminal vesicle does is it releases a fluid substance that contain nutrients such as fructose and proteins that are needed by the sperm cells. So when the sperm cells enter the ejaculatory duck they mix with that fluid that is produced by the seminal vesicle and then that fluid travels into our urethra. This canal shown in purple. Now notice we have this gland along the urethra known as the bulbourethro gland and we also have another gland known as the prostagland. Now these two glands both release a slightly basic solution, a slightly basic substance. The only difference is the bulba urethral gland releases that substance before ejaculation takes place while the prostate gland releases that substance during ejaculation.