288 OP THR SECRETIONS IN GENERAL. 



miliary globules, which are easily discoverable in most 

 glands, as acini internally excavated. Ruysch, on the 

 contrary, contended that these supposed hollow acini 

 were nothing more than glomerules of blood vessels, — 

 an opinion far more consistent with microscopical 

 observation and the effects of minute injection. 



471. The structure of some secreting organs, espe- 

 cially of the liver and kidneys, the latter of which 

 strikingly exhibit the glomerules of Ruysch or the acini 

 of Malpighi, are not, excepting in their peculiar paren- 

 chyma, very dissimilar from this structure, and indeed 

 throw considerable light upon the question. On the 

 outer part of these, small twigs arise from the sides of 

 the capillary arteries and run into vascular glomerules, 

 hanging like granules as from stalks : from these arterial 

 glomerules spring both very minute colourless secreting 

 vessels whose origin from the extremities of arteries 

 was formerly alluded to (92), and the radicles of veins 

 into which the arteries are continued, and which convey 

 back into the venous trunks the remaining blood de- 

 prived of the secreted fluid.* 



472. The organisation of some other secreting parts 

 is evidently peculiar, v.c. of the testes, which are com- 

 posed of very long and numerous vessels, closely com- 

 pacted, &c. 



473. That the different nature of the secreted fluids 

 depends not so much on the size and external form of 

 the secreting organs as upon their interior structure and 

 corresponding vital powers, is rendered probable by 



But consult especially his Opera Potthmna. ib. 1697. fol. ; and published 

 likewise elsewhere. 



• Al. Srhiimlansky, Dr Uructura rtmtm. Arjrent. 1/K2. 4to. tab. ii. 



