Manual of human histology . , in the adult, commences atthe base of the epiglottis and, above the upper vocal ligaments,is composed of several laminae [vide § 21), on the whole0-024—0-04 thick; with the exception of the vocal liga-ments, which, as was discovered by H. Eheiner and I canconfirm, have a squamose epithelium, it lines the rest of thelarynx throughout. The proper ciliated cylinders 0-015—0-02 long, and 00025—0-004 broad in the mean, withelongated round nuclei of 0-003—0-0045, and occasionallywith a few fat-granules, are mostly much acuminated, fre-quently even prolonged into slender
Manual of human histology . , in the adult, commences atthe base of the epiglottis and, above the upper vocal ligaments,is composed of several laminae [vide § 21), on the whole0-024—0-04 thick; with the exception of the vocal liga-ments, which, as was discovered by H. Eheiner and I canconfirm, have a squamose epithelium, it lines the rest of thelarynx throughout. The proper ciliated cylinders 0-015—0-02 long, and 00025—0-004 broad in the mean, withelongated round nuclei of 0-003—0-0045, and occasionallywith a few fat-granules, are mostly much acuminated, fre-quently even prolonged into slender filaments, which mayattain such a length that the entire cell may equal 0-024—0-027^. The cilia are fine, transparent, soft processes of thecell-raembrane, 0-0016—0-0022 long, which arise from it witha rather broader basis, and terminate in a pointed extremity. THE LUNGS. 163 Most usually they are placed close together, over the whole ofthe terminal surface of the cells, according to Valentin, on the Fig. average, to the number of 10 to 22, which appears to be ratherunder the mark; more rarely they occur in smaller number,or even, as it is said, singly upon a cell. But in this case, caremust be taken not to regard cohering cilia as single ones, asmight happen, particularly in the embryo. In their chemicalrelations the cells of the ciliated epithelium correspond pre-cisely with those of the cylinder-epithelium, and especially,the separation of the cell membrane on the addition of water,may also be remarked in them. The cilia are of much moredelicate consistence than the cell membrane and are very rea-dily detached upon any maceration of the epithelium; more orless altered by almost all reagents, they are, by many, at oncedestroyed; in chromic acid, however, they may be preservedpretty well. In man, the ciliary motion is directed, in thetrachea, from below upAvards and may often be perceivedfifty-two or even fifty-six and seventy-eight hours after death(Bierme
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Keywords: ., bookcentury1800, bookdecade1850, booksubjecthistolo, bookyear1853
