MUSCULAR ACTION 



379 



in the more finely adjustable muscles (such as those of the eye) than in 

 the coarser muscles (like the glutei, for example). Most of the fibers in 



FIG. 233 



The anastomosis of muscle-bundles as found in the urinary bladder of the cat. Intermuscular 

 nerve-cells and -fibers are to be seen between two of the muscle-bundles. (Metzner.) 



FIG. 234 



Nucleus 



Primitive fibril 



Isotropic layer .- 1 ii * i H | f> j j < h i!if!H 



ihwj Ihnivii&i 



&iniii2!~**-3 



^imillTu^ 



A bit of a cross-striated muscle of a frog, showing the nucleus and the ease of its division 

 both transversely and longitudinally. 650 /i. (Szymonowicz and MacCullum.) 



