112 



SIMPLE HISTOLOGICAL ELEMENTS. 



CHAPTEE III. 



Fig. 48. 



SIMPLE FIBRE. 



FIBRES enter i$to the composition of some of the compound 

 tissues ; and two of the simple tissues the white and the yellow 

 fibrous tissues are formed of them exclusively. Simple fibre is, 

 however, something entirely different from these, and sustains to 

 them no higher comparative rank than do the lower forms of ho- 

 mogeneous substance in comparison 

 with osteine. 



An example of simple fibre, always 

 easy to obtain for illustration, is found 

 in the membrane lining an egg-shell 

 (membrana putaminis), which consists 

 of several layers, each formed by the 

 interlacement of simple fibres. (Fig. 

 48.) 



Pure coagulated fibrine also consists 

 merelv of a network of simple fibres 

 (p. 92). 



Simple fibre appears always to consist of mere threads of coagu- 

 lated fibrine. In other words, it 

 appears to be merely the result of 

 the fibrillation of fibrine already 

 described (p. 93). These threads 

 average about 55^0 f an i ncn i n 

 diameter. Of coarse they are less 

 perfectly developed in the cir- 

 cumstances in which coagulation 

 is less perfect (p. 95). On the 

 other hand, they are most per- 

 fectly developed in inflammatory 

 exudations. 



The human chorion appears to 



Simple fibres of membrane lining the 

 egg-shell. 



Fig. 49. 



Simple fibres in inflammatory exudation from 

 peritoneum. 



