THE ALIMENTARY CANAL 



345 



forms a continuous tube whose wall has, throughout its entire extent, 

 many common characteristics. Thus the wall in all portions consists oJ 



Tongue 



Parotid gland 

 Sublingual gland 

 Submaxillary gland 



Pylorus 



Appendices epiploicae 



Jejunum 



Longt. muscle band 



Cecum 

 Vermiform appendi. 



FIG. 324. DIAGRAM OF THE ALIMENTARY CANAL OF MAN. 



7s, small intestine; Ca, Ct, and Cd, ascending, transverse and descending portions 

 of the colon; Ph, pharynx; Vic, ileocolic valve. (Adapted from Wiedersheim.) 



.four coats which are respectively known, from within outward, as the 

 mucous, suhmucous, muscular, and fibroserous. The three outermost 

 coats are of very similar structure in all portions of the tract. 



The Fibroserous Coat. In the abdominal cavity the outermost 



