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) #pleasure_library (General chat with real people) #pleasure_library_dungeon (Welcome to the dungeon) #milf (So you love older women?, come on in) #gangbang (So you think you can handle more than one do you?Cryoconservation of animal genetic resources is a practice that calls for the collection of genetic material in efforts for conservation of a particular breed.Depending on the species, spermatozoa can fertilize ova externally or internally.The seminal plasma provides a nutritive and protective medium for the spermatozoa during their journey through the female reproductive tract.The normal environment of the vagina is a hostile one for sperm cells, as it is very acidic (from the native microflora producing lactic acid), viscous, and patrolled by immune cells.

Internal fertilization takes place after insemination of a female by a male through copulation.

A zinc deficiency may result in lowered fertility because of increased sperm fragility.

Zinc deficiency can also adversely affect spermatogenesis.)galactose, mucus (serve to increase the mobility of sperm cells in the vagina and cervix by creating a less viscous channel for the sperm cells to swim through, and preventing their diffusion out of the semen.

The seminal vesicles produce a yellowish viscous fluid rich in fructose and other substances that makes up about 70% of human semen.

Sertoli cells, which nurture and support developing spermatocytes, secrete a fluid into seminiferous tubules that helps transport sperm to the genital ducts.

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The components in the seminal plasma attempt to compensate for this hostile environment.