Archive image from page 500 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana03todd Year: 1847 Fig. 273. A portion of a tribute of the human kidney, magnified 300 diameters. At «, the basement membrane and epithelium are both seen in a natural state. At b, the base- ment membrane has been sepa- rated, and the epithelium is some- what swollen, and its outline • woolly.' At c, the epithelium has been detached and the base- ment membrane is seen somewhat wrinkled : d, a detached epithe- lial particle seen in face ; its minutely mottled texture is not repre
Archive image from page 500 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana03todd Year: 1847 Fig. 273. A portion of a tribute of the human kidney, magnified 300 diameters. At «, the basement membrane and epithelium are both seen in a natural state. At b, the base- ment membrane has been sepa- rated, and the epithelium is some- what swollen, and its outline • woolly.' At c, the epithelium has been detached and the base- ment membrane is seen somewhat wrinkled : d, a detached epithe- lial particle seen in face ; its minutely mottled texture is not represented in the wood-cut. most probably the earlv condition of the new or advancing series of these particles. Its thickness in the kidney certainly does not ex- ceed the sjffijgth of an English inch. I have dis- covered, that in the Malpighian bodies of the kidney, which are the dilated extremities of the urmiferous ducts, with an enclosed tuft of arterial capillaries, the basement membrane is often, to some extent, naturally bare, without a covering of epithelium. This is the only situa- tion of the body in which such an arrangement is known. In the testis, the same membrane may be shewn without difficulty to be that which gives to its secreting tubules their peculiar strength ; and here, as might be expected, it is somewhat modified. The difference is principally as regards its thickness, which here reaches -nth of an English inch, and in some animals Fig. 274. appear to form an integrant part of the wall of the canal. A portion of a tubule of the testis (Guinea-pig, Co- baya)f magnified 300 diameters. a a, basement membrane ; a, corpuscle in its sub- stance ; b b, epithelium in situ, consisting of par- ticles of different dimensions, with minute gra- nules in their interstices ; c, cavity of the tubule full of detached epithelium particles, of various size and appearance, and mingled with nume- rous seminal animalcules ; d, one of these semi- nal animalcules. eve
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