Sperm, semen - fluid secretion, which consists of the products of the testes, seminal vesicles, epididymides, puerperal glands and prostate gland. It is ejected through the urethra during ejaculation. Semen is milky white color. Seminal fluid is slightly alkaline (pH 7,2), and helps regulate sperm motility, in acidic environment sperm are immobile.
Chemical composition of sperm depends to a certain extent on nutrition.*
Ejaculation (eiaculatio – ejaculation) - Ejaculation of semen (sperm), the release of sperm cells and seminal plasma from the male reproductive system. Ejaculation is a physiological process heavily controlled by the autonomic nervous system. Semen is the liquid which is erected from the penis during ejaculation.
The mechanism that enables ejaculation is the rhythmic contraction of the corpora cavernosa, located in the penis, so that the sperm is ejected from the reproductive organ outside the body.*