54 



FIG. 28. Diagram of nervous and cross-striate muscular tissue, showing the mode of 

 connection between nerve fibres and muscle fibres. A, nerve cell (g) connected with 

 muscle fibre (mf.) by nerve fibre (n./.). The muscle fibre (m./.) is composed of 

 numerous fibrils (/) which are made up lengthwise of alternating discs of lighter and 

 darker substance. These fibrils are shown more highly magnified in B and C. In 

 B the fibril is uncontracted ; in C it is contracted. D, nerve fibre more highly 

 magnified showing a, axis; m, medullary sheath; and .?, Schwann's sheath; ax., axon; 

 d, dendron; n, node; n.m., nerve-muscle plate. 



