Plate II. — Histology of muscle. 



A y Cardiac muscle of the frog; B, cardiac muscle of man; 

 C, part of a skeletal muscle fibre of the frog, showing the 

 ending of a motor nerve fibre. 



ojc.c, Axis cylinder of the nerve fibre ; dr., branches of the same 

 after it has lost its medullary sheath; n.br.^ nuclei of the 

 branches; »./., nuclei of the nerve fibre; «.»z., nuclei of 

 muscle fibres. 



