HISTOLOGY OF MUSCLE TISSUE 
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example, Necturus, frog, or rat. Cover and examine. Stain 
under the cover-slip with methylene blue. 
2. Mount in a drop of glycerine a few teased fibers of muscle, 
either amphibian or mammalian, which has been preserved in 
70% alcohol or 10% formalin. Cover and examine. 
3. Study transverse and longitudinal sections of rabbit and of 
Necturus muscle (Lab. SI. Coll.). 
Draw details to show your conception of the structure of a striated 
muscle fiber, including cross sections of fibers. 
C. STRIATED INVOLUNTARY, OR HEART MUSCLE. 
Examine sections of heart muscle and note that although its 
fibrils show cross striations very similar to those of voluntary 
muscle, the syncytium is in the form of a reticulum instead of 
separate fibers, and that the nuclei are relatively large and few. 
Draw. 
