238 



COMPARATIVE ANATOMY 



often present at the junction of the large and small intestine. 

 Between the stomach and duodenum as well as between the ileum 



FIG. 190. DIAGRAM OF THE ALIMENTARY CANAL OF MAN. 



salivary glands ; Ph, pharynx ; Gl.th, thyroid ; Cll.thy, thymus ; Ly, lung ; 

 Oe, oesophagus ; Z, diaphragm ; My, stomach ; Lb, liver ; Pa, pancreas ; 

 J)d, small intestine ; Vic, ileo-colic valve ; Pv, vermiform appendix (caecum) ; 

 Ca, Ct, Cd, ascending, transverse, and descending portions of the colon ; A', 

 rectum ; A , anus. 



and large intestine there is, as a rule, a marked elevation of the 

 muscular coat serving as a sphincter (pyloric and ileo-colic valves). 

 There is also a sphincter muscle at the anus. 



