. The neuroses of the genito-urinary system in the male with sterility and impotence. chloride of sodium). According toHoppe-Seyler, semen contains an albuminoussubstance called spermatin, which, in its reac-tions, bears a resemblance to casein. The sper-matozoa contain also lecithin in abundance. In normal semen, besides spermatozoa, sper-matic cells, epithelium from the jjrostate andurethra and molecular detritus, so-called semi-nal granules can be distinguished with themicroscope (Fig. 9). Before puberty, as wellas in old age, semen contains no spermatozoa,but only seminal granules, yet nev
. The neuroses of the genito-urinary system in the male with sterility and impotence. chloride of sodium). According toHoppe-Seyler, semen contains an albuminoussubstance called spermatin, which, in its reac-tions, bears a resemblance to casein. The sper-matozoa contain also lecithin in abundance. In normal semen, besides spermatozoa, sper-matic cells, epithelium from the jjrostate andurethra and molecular detritus, so-called semi-nal granules can be distinguished with themicroscope (Fig. 9). Before puberty, as wellas in old age, semen contains no spermatozoa,but only seminal granules, yet nevertheless agedmen are often met with, in whose semen numer- See description of normal semen on page 83. 114 Sterility and Impotence. ous spermatozoa are still found. Sometimesthese granules are also massed in cylindricalforms. These have some resemblance to thedark granular renal casts which occur in theurine in chronic Brights disease. The sperma-tic cells are the breeding-places of the sperma-tozoa; and, according to KoUiker, out of eachnucleus of a cell a spermatozoon Fig. 9.—Normal Semen, a, Lving spermatozoa; h. Sperm-atic cells; c, epithelium (from the prostate ?); d, seminalgranules. 300 diameters. Normal semen, sheltered from light and cold,after 48 hours still shows living spermatozoaunder the microscope. In spermatozoa whichhave died gradually after ejaculation the tailis outstretched, or, at most, slightly curved,whereas in those that are discharged motion- Sterility and Impotence. 115 less, ^ dead, the tail is either rolled up in aspiral or bent. Spermatozoa which have beenkilled by injurious secretions (urine, acid vagi-nal secretions, etc.) very commonly show thiscondition. The motion of the spermatozoa in fresh semenis extremely lively. By whiplike wriggling ofthe tail the head is urged forward and windsits way, without striking against other cells,through the narrowest passages in the micro-scopic field. This migration of the spermatozoa,suggest
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