Semen
From Simple English Wikipedia, the free encyclopedia
Semen is the liquid that comes out of a man's penis when he orgasms. He can do this either by sex or masturbating.
This fluid is usually a cloudy white, gooey substance. Semen clots almost immediately after ejaculation, forming a sticky, jelly-like liquid, helping it adhere to the cervix (the entrance to the uterus, located at the end of the vagina). Sperm remains relatively immobile within this clot. It will liquefy again in 5 to 40 minutes becoming runny and clear, allowing it to enter gradually through the cervical canal. PSA (prostate specific antigen), a constituent of prostatic fluid is responsible for dissolving the clot, liberating the sperm, and so making them much more active.
It is quite normal for semen to form jelly-like globules and this does not indicate any health or fertility problem. It is not uncommon to see a yellowish tint to the semen if you've abstained from ejaculation for a while. Semen is made up of 40-60 percent of fluid from the seminal vesicles, 13 to 33 percent from the prostate, 5 percent from the testicles and epididymes, and 5 percent from the bulbourethral and urethral glands . Semen itself has high concentrations of potassium, zinc, citric acid, fructose, phosphorylcholine, spermine, free amino acids, prostaglandins and enzymes, which nourish and protect the sperm. An ejaculation contains 40 million to 600 million sperm.
Different sexually transmitted diseases, such as HIV, gonorrhea, chlamydia, nongonococcal urethritis (NGU) and cytomegalovirus (CMV) can all be transmitted through semen.
