SYSTEMATIC ANALYSIS OF APPARATUS. 



115 



Fig. 100, a plan of Di- 

 gestory apparatus, the head 

 being divided on the mid- 

 dle line and turned to the 

 right, showing the mouth, 

 1, extending back into the 

 pharynx, 9, which contin- 

 ues into 3 the oesophagus, 

 represented open above, en- 

 tire at its centre, and open 

 again below, continuous 

 with the stomach distend- 

 ed and the front half re- 

 moved. 15, is the pyloric 

 orifice through which the 

 contents of the Stomach 

 pass into the Second Sto- 

 mach, the upper or duode- 

 nal part of which is re- 

 presented open ; 17 is the 

 same entire, coiled from 

 side to side till again open- 

 ed at 27, just beyond which 

 it communicates with the 

 Colon represented open 

 throughout its entire ex- ~ 

 tent; 23, duct from Pan- 

 creas opening at 16 ; 18, 

 Gall-bladder; 19, its duct; 

 20, duct from liver; 21, the 

 trunk of both ducts open- 

 ing at 22 (and sometimes 

 through the same orifice as 

 23 does). This cut, there- 

 fore, illustrates in one view 

 all the organs of the Diges- 

 tory Apparatus except the 

 glands of the Mouth, Sto- 

 mach and Second Stomach. 

 The latter two kinds are 

 too small to be represented 

 in a cut of this size. 41, 

 orifice leading to ear; 11, 

 soft palate; 10, spinal ca- 

 nal; 5, windpipe; 8, lar- 

 ynx. 



FIG. 100. 



Describe Fig. 100. "What is the position of oesophagus in relation to windpipe 

 and spinal column ? How many times across does 2d stomach pass ? 



