252 



THE ORGANS 



connective tissue separates the two layers of muscle. From this 

 septa extend into the muscle tissue, separating it into bundles. 



4. The serous coat (Fig. 152) is the visceral layer of the perito- 

 neum. It consists of a thin layer of connective tissue covered by a 

 single layer of mesothehum. Along the attachment of the mesentery 

 the serous coat is wanting. 







.^ 



0.C 



.;^CS^ 



W0!^':>?9rp 



■M 



■^^^■.■<^ 



Fig. 153. — Section through Junction of (Esophagus and Stomach of Man. X121. 

 (Schafer.) Oe, (Esophagus; M, stomach; cd, cardiac glands; wd, dilated ducts of cardiac 

 glands; 5, stroma; E, stratilied squamous epithehum of oesophagus; mm, muscularis 

 mucosae; cd, irregularly cut tubules of cardiac glands; dd, cardiac glands in lower end of 

 the oesophagus; u, limit of stratified oesophageal epithelium. 



The subdivisions of the gastro-intestinal canal differ from one 

 another mainly in regard to the structure of their mucous membranes, 

 and especially in regard to the structure of the glands of the mucous 

 membrane and submucosa. 



The Stomach 



At the junction of oesophagus and stomach there is an abrupt 

 transition from the stratified squamous epithehum of the former with 

 its smooth surface to the simple columnar epithelium of the latter 



