NOTE. In some cases illustrations of tissue from the lower animals are given for 

 the reason that, while the tissue is the same as that of man, the microscope feveals the 

 structure more plainly. 



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STRIPED MUSCLE OF CRAB 



(RELAXED), 

 STAINED WITH H^MATOXYlvIN, 



TEASED * 250. 



a. Muscular fibre, or portion of one 

 b. Fibrils. 



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STRIPED MUSCLE OF CRAB 

 (EXTENDED), STAINED 

 WITH H^MATOXYUN, 



TEASED x 450. 



A. I/ight stripe. 

 , B. Dark stripe. 

 C, Intermediate segment in 

 light stripe. 



CARDIAC MUSCLE (HUMAN), STAINED WITH H^MATOXYIJN x 300. 



a. Muscle cells. 



b. Nuclei of satrie, with yellow pigment at poles. 



c. Fibrous tissue between muscle fibres, 



d. Junctions of segments of muscle. 



e. Capillary blooo-vessel. 



