52 Introductory Biology 



^SARCOLEMMA 

 --NUCLEUS 



-DARK BAKD 

 LIGHT BAND 



-.-.NUCLEUS 



A 



'CYTOPLASM — 



-NUCLEUS 



•EPIMYSIUM 



B 



Fig. 14. — Muscle tissues. A, Striated (cross-striped) ; portion of a single cell 

 or fiber; B, nonstriated (smooth); several cells; C, cardiac (indistinctly striated); 

 several cells. Observe the branchings between the various cardiac cells and the 

 several nuclei in the striated type. 



Fig. 15. — Bas relief photomicrograph of striated muscles showing the banded 

 condition at a magnification of 1,000 X. (Copyright by General Biological Supply 

 House, Inc., Chicago.) 



