CCHANISM. 



193 



minute artery, i.e. of one 

 3 capillaries, and which is 

 isists of the following parts, 

 pithelioid cells, very similar 

 cemented together into a 

 hese fusiform cells, which 

 parallel to the axis of the 



jomes a thin transparent 

 >rane, seen in an optical or 

 e line, which serves as a 

 rane, or membrana propria, 

 ane is similar in chemical 



fibres found in connective 

 e elastic membrane. The 

 abrane together are often 

 lica intima) of the artery. 

 ess distinctly spiral manner 

 I in a small quantity of 

 i muscular fibres, arranged 

 fer, in the larger but still 

 fer. This forms in these 

 nica media). Outside this 



(tunica extima) consisting 

 hich are disposed for the 

 a number of connective 

 i number of elastic fibres. 

 i connective tissue bed in 



capillary, in the thickness 

 r so characteristic of the 

 le distinct development of 

 of the inner coat, and the 

 reby elastic qualities are 

 ssel, and lastly and chiefly 

 tnents. It is obvious, that 

 :ments, passive changes of 

 e capillary, active changes 

 best doubtful, are assured 

 When these transversely 

 lust narrow the calibre of 

 very considerable internal 

 he internal pressure which 

 mporarily to increase the 



up into capillaries the 



disappear, the remnant of 



^nued for a short distance 



F. 



13 



