37 

 THE MUSCULAR TISSUES : THE MUSCULAR SYSTEM. 



LABORATORY WORK FOR THE-- --WEEK. 



References : 



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Points for Quiz : 



Laboratory Report : 



Due: 



Go the delivery desk for (a) assigned [slide, 69 ; (b) a paraffin 

 section, 61 ; (r) a collodion section, 67 ; (d) 58; 68, now in 

 glycerin ; mount as directed. (<?) 57 is in thin balsam ; mount a 

 drop of the balsam. (/) Obtain 63, 64 and 65 and prepare them as 

 directed, (g} 60, 62 and 66 take in order. 



NON-STRIATED, PLAIN OR SMOOTH MUSCLE. 



57. Muscle cells from the intestine. Cat. Isolated. 

 The muscular coats of the intestine were dissociated in nitric acid 

 dissociator ( 1 1 ) , washed in water, the cells separated and stained 

 with eosin, now in balsam. Place a drop upon a slide and apply a 

 cover glass. Note the length of the muscle cells, the form, and size 

 of the nucleus in the center. Contraction nodes may also be found 

 in the fibers (cells) ; study them. For the nucleus and striation 

 study 59. 



58. Muscle cells from an artery. Cow. The uterine 

 artery was placed in nitric acid dissociator ( n), the muscular 

 coats teased out to separate the cells. Stained in erythrosin, now 

 in glycerin ; mount in glycerin jelly. Find good examples of iso- 

 lated cells and study, comparing them with the cells in 57 as to rela- 

 tive length and width, and the form and size of the nucleus. 



59. Plain muscle cells. Demonstration. This preparation 

 is intended to show especially (a) the shape, size and position of the 

 nucleus in the cells of plain muscle, and () the longitudinal 

 striation of the muscle fiber. Compare 57 and 58, identifying in 

 them the nucleus and, if possible, the longitudinal striation. 



60. Anatomy of muscular coats (intestine). Cat. Obtain 

 from the delivery desk a small piece of the intestine, that has been 



