MUSCULAR FIBRE-CELLS. 

 Fig. 244. Fig. 245. 



I 



385 



Fig. 246. 



Human muscular fibre-cells from the innermost 

 layer of the axillary artery: a, without, b, with 

 acetic acid. a. Nucleus of the fibre. Magnified 350 

 diameters. (KiJlliker.) 



shall, therefore, quite as frequently 

 term them smooth muscular fibres. 

 The more common forms of the 

 fibre-cells have been mentioned. 

 But in the walls of the bloodvessels 

 (Fig. 244), they are so much less 

 elongated as sometimes to have been 

 mistaken in the smallest, for epithe- 

 lial cells; while in the alimentary 

 canal, uterus, &c., they 

 become what have long 

 been called the non-stri- 

 ated muscular fibres of 

 these organs. The lar- 

 gest of all appear in the 

 impregnated uterus ; and 

 Fig. 245 shows one of the 

 long cells as compared 

 with those of Fig. 244. 

 Rarely, also, the cells are 

 in the form of elongated, 

 quadrangular, or club- 

 shaped plates, with fring- 

 ed margins. (Fig. 244, a, 

 and 245, 6, c.) 



Muscular fibre-cell from the fibrous investment of 

 the spleen of the dog. Magnified 350 diameters. 

 (KoUiker.) 



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