88 



HISTOLOGY. 



phragm. Lymphatic and blood vessels and nerves extend through the 

 perimysium. The lymphatic vessels end before reaching its smaller 



Muscle spindle. 



Cross section 

 of nerve. 



FIG. 104. FROM A CROSS SECTION OF THE OMOHYOID MUSCLE OP MAX. X 60. 



subdivisions. Capillary blood vessels are found between the individual 

 fibers, with which they tend to be parallel. The nerves, chiefly motor, 

 terminate on the fibers. Sensory nerves are associated with the muscle 



spindles (Figs. 104 and 105) 

 Muscle fiber. Connective tissue. w hi c h in cross section are 



small groups of slender 

 fibers, containing many nu- 

 clei. (For further descrip- 

 tion see page 103.) 



Since adult striated 

 muscle fibers attain a length 

 of from 50 to 120 millime- 



Cross section Muscle fibers Nucleus Nucleus of the , , . j. < 



of nerve. of the of the sarcolemma. terS, Complete longitudinal 



spindle, perimysium. . - , , , 



, sections of them are seldom 



FIG. 105. THE>!USCLE SPINDLE SHOWN IN FIG. 104. Xz4o. 



seen. A single fiber contains 



very many nuclei (scores or perhaps hundreds), generally flattened oval 

 structures just inside the sarcolemma. Sometimes the nuclear membrane 

 is indented by the adjacent fibrils. The sarcolemma is most clearly seen 



Connective tissue. 



