vii STRIPED MUSCLE 113 



It will be seen that striped muscle, unlike the tissues 

 previously considered, does not appear to be composed 

 of cells, although the occurrence of nuclei seems to indicate 

 their presence. In the embryo, however, the muscle is 

 formed of ordinary nucleated cells, which, as growth goes 



FIG. 32. A, part of a fresh muscular fibre of a frog. B, the same after treatment 



with distilled water followed by methyl green. 



b. bright bands ; d. dim bands ; n. nuclei ; s, s'. sarcolemrna, rendered visible as a 

 minute blister (/) by absorption of water and by the rupture of the muscle- 

 fibre at .?. (A, from Huxley's Physiology.} 



on, increase in length while their nuclei multiply by fission, 

 each enormously elongated cell thus containing a consider- 

 able number. 



Connective-tissue. We will next examine a piece of the 

 delicate web of connective-tissue which binds the muscles 

 together. 



Under the high power, connective-tissue is seen to be 



FRACT. ZOOL. I 



