During ejaculation, the smooth muscle in the walls of the<unk>  contracts reflexively, thus propelling the sperm forward. This is also known as peristalsis. The sperm is transferred from each<unk>  into the urethra, partially mixing with secretions from the male accessory sex glands such as the seminal vesicles, prostate gland and the bulbourethral glands, which form the bulk of semen.
Vas deferens
Corpus cavernosum penis
Penis
Collyrium
Subfornical organ
Meibomian gland
Uterus
Ovary