TISSUES. 



Musck. 



verse plane of the fiber and in the middle of the light 

 band. The light band represents an abundance of 

 sarcoplasm and it is in this sectional area that the 

 sarcostyles suffer a constriction. As Hensen's me- 

 dian disc is a light line in the middle of the dark 

 band there must be 

 a deep constriction, 

 if not a complete 

 constriction of the 

 sarcostyles at this 

 point. 



The whole muscle 

 fiber between the 

 two Krause's mem- 

 branes is called a 

 sarcomere, and con- 

 sists of a median 

 dark band and the 

 proximal halves of 

 the adjacent light 

 bands. A single 

 fibril or sarcostyle 

 between two of 

 Krause's mem- 

 branes is called a 

 sarcous element. 



It is believed that 

 muscular contractil- 

 ity is particularly a function of the sarcostyles and 

 that the sarcoplasm serves more as a storage of energy 

 or food. As to color there are two kinds of muscle, 

 white and red. In white meat, as the muscle of the 



Fig. 58. Part of a longitudinal sec- 

 tion through the line of junction be- 

 tween muscle and tendon. At the line 

 where the tendon fibrils join the sarco- 

 lemma (a), the nuclei of the muscle are 

 very numerous. Sublimate preparation 

 (Bohm and Davidoff). 



