 the ultrastructure of cardiac muscle is described . in the course of the descriptions advantage 
 has been taken of comparative anatomy , in order to elucidate the relationships between structure and function . 
 physiologic parameters are discussed in a comparative manner including information from skeletal muscles fibers that often provide a well - studied point of departure . 
 the descriptions of the ultrastructure of cardiac muscle are illustrated by a few electron photomicrographs to give a general overview.imagesfigure 1.figure 2.figure 3 . 
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