Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . the urinary tract arelined with different forms of epithelial cells, it becomes nec-essary, when examining urinary sediments, to note not onlythe relative number of such cells, but at the same time tocarefully observe the shape of the various individuals inorder to determine, as far as possible, from what portion ofthe tract they have been derived. Since the different layersof the epithelial lining are composed of cells different in formfrom those
Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science . the urinary tract arelined with different forms of epithelial cells, it becomes nec-essary, when examining urinary sediments, to note not onlythe relative number of such cells, but at the same time tocarefully observe the shape of the various individuals inorder to determine, as far as possible, from what portion ofthe tract they have been derived. Since the different layersof the epithelial lining are composed of cells different in formfrom those of the associated layers, it is evident that a carefulmicroscopical examination of these cells may tell us the par- urine: sediments. 329 ticular layer which is being desquamated. It is frequently amost difficult undertaking, however, to make a clear differen-tiation between the various forms of epithelial cells presentin a sediment. If skilfully done, such a microscopical differ-entiation may prove to be of very great diagnostic aid. The principal forms of epithelial cells met with in urinarysediments are shown in Fig. 105, below. Fig. Epithelium from Different Areas of the Urinary , Leucocyte (for comparison); b, renal cells; c, superficial pelvic cells; d,deep pelvic cells; e, cells from calices ; /, cells from ureter; g, g, g, g, g, squa-mous epithelium from the bladder ; /;, h, neck-of-bladder cells; i, epitheliumfrom prostatic urethra ; k, urethral cells; /, /, scaly epithelium; m, in, cellsfrom seminal passages; n, compound granule cells; o, fatty renal cell.(Ogden.) Pus Cells.—Pus corpuscles or leucocytes are present in ex-tremely small numbers in normal urine. Any considerableincrease in the number, however, ordinarily denotes a patho-logical condition, generally an acute or chronic inflammatorycondition of some portion of the urinary tract. The suddenappearance of a large amount of pus in a sediment denotesthe opening of an abscess into the urinary trac
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