The internal secretions and the principles of medicine . blood wdth an equal amount of dis-tilled water containing 1 per cent, of alcohol. The granulesl)ccome very active and present a characteristic picture. The granulations of leucocytes are thus similar to sperma-tozoa in chemical composition, staining properties; like theseorganisms they are motile—the motions in both being vil)ratile—and they are capable of becoming chromosomes in the processof reproduction. They are practically tailless spermatozoasuch as those of myriapods, and when they work their wayinto the tissues, and enter cells i
The internal secretions and the principles of medicine . blood wdth an equal amount of dis-tilled water containing 1 per cent, of alcohol. The granulesl)ccome very active and present a characteristic picture. The granulations of leucocytes are thus similar to sperma-tozoa in chemical composition, staining properties; like theseorganisms they are motile—the motions in both being vil)ratile—and they are capable of becoming chromosomes in the processof reproduction. They are practically tailless spermatozoasuch as those of myriapods, and when they work their wayinto the tissues, and enter cells in aggregated masses (as in thecell-body of neurons), recall the sperm a tnph ores of certain uro-deles. The penctraiion of the granulatinus into tissue-cellsthus becomes a normal feature of the process of nutrition; theyenter the cell as a spermatozoon enters an ovum. In myopinion Auerhachs terminal buttons are naught else thansuch granulations, as shown in the annexed plate. «* ff. this vol., p. 887. >«=Sangree: Medical Bulletin, Jan., LEUCnCYTE ERANULaTIDNS IN THE ACT DF PENETRATING THE CELL-BDEY DF A NEURON, [ Na-DC7 TEgarded as the tBrmlnal hutton of iluBThach, Two large funicular cells of the spinal card of the adult rabbit. RttET Raman y Cajal, 1903, {Barker.) LEUCOCYTE GRANULATIONS AS LIVING SUBSTANCE. Dol That they are living bodies is another conchision imposedby their correspondence with spermatozoa, which are themselvesregarded as living cells. Landois/* for example, writes thatthe spermatozoa of the frog may be frozen four times succes-sively without injury; they endure a heat of ° C. and con-tinue to live for seventy days in the testicle transplanted to theabdominal cavity of another frog. Now, we have seen that thehead of the spermatozoon contains chromatin and also that allcells show among the granules in their protoplasm some thatcorrespond in their staining properties and chemical composi-tion with those of leucocyte granulations.
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