AND PHYSIOLOGY. 



109 



Fig. 123. 



Fig. 124. 



A broken Muscular Fiber shoeing tho 

 6heath or myolemma untorn. 



Fig. 125. 



Transverse Section of Human Fibrillre 

 showing a Polygonal form. 



scope, the Animal Fiber being 

 marked by transverse striae, 

 or stripes resembling a beaded 

 filament, called Striped Fi- 

 ber; and the Organic being 

 made up merely of flattened 

 bands destitute of these cross 

 marks, and hence called tin- 

 striped, or smooth fiber. The 

 unstriped fibrils are developed 

 from cylindrical or spindle- 

 shaped nucleated cells, and 

 are surrounded by a peculiar 

 fluid known as muscle juice, 

 which is unlike the plasma of 

 the blood, since it contains 

 casein. 



231. Tendons, Aponeuro- 

 ses, Belly or Swell of the Mus- 

 cle. — The extremities of the 

 muscles are composed of dense 

 areolar tissue in the form of 

 tendons or cords, and that 

 extremity which is nearest to 

 the center of motion is called the Origin, while the one most 



Fusiform Cells of Smooth Muscular Fi- 

 ber, a, Two cells in their natural state. 

 2>, A cell treated to acetic acid, showing tho 

 nucleus c. 



What is the appearance of tho Animal Fibre under the microscope ? Also that of the 

 Organic? 231. State the composition of the Tendons. 



