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Dołączył: 23 Kwi 2011
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 Wysłany: Pią 2:49, 20 Maj 2011 |
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Life of Sperm
By: Julian Sagan
What could be easier than the conception process? After ejaculation an army of sperm cells rushes toward the female egg,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], but these sperm cells have to face a lot of obstacles on their way. And only one of them, the sturdiest and with the most vitality, will reach the target.
The birth of spermatozoon, male reproductive cell that carries genetic information, takes place in the testicles at the speed of about 1000 spermatozoa per second. So over the whole day the male body produces more than 72 million spermatozoa and this process does not stop even for a minute from youth until old age. There have been experiments proving that even the sperm of 80-year-old men contains cells of great vitality with the total number of cells from 200 to 400 million. The conception is possible with at least 50 million spermatozoa. The most active sperm cell moves to the target literally over other spermatozoa’s “dead bodies”,[link widoczny dla zalogowanych],[link widoczny dla zalogowanych], which die in mass in the acid environment of the vagina in the struggle to create new life.
It takes about 70 days for a healthy and nimble spermatozoon to come into the world. The cells constantly mature continuously undergoing the quality check by special controllers
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