THE STOMACH. 



1625 



the vicinity of the pylorus, and sometimes also at the cardia, a number of small 

 lymphatic nodes — the so-called lenticular glands — normally occupy the deeper 

 parts of the mucosa ; occasionally they are of sufificient size to almost reach the 

 free surface. 



The tmcscularis mucoscs, as in other parts of the intestinal tube, consists of a 

 well-marked collection of involuntary muscle, deeply situated next the submucous 

 coat. Two layers are usually distinguishable, an inner circular and. an outer longi- 



FiG. 1377. 



iucous coat 



Wide orifice of 

 glands 



Pyloric 

 glands 



iucous coat 



.Circular muscle 



■I oiigitudinal muscle 



Serous coat 



Transverse section of stomach, pyloric end ; ruga is cut across, showing mucosa supported by core of submucous 



tissue. X 20. 



tudinal. Towards the mucosa numerous bundles of muscle-cells extend between the 

 glands and in places penetrate almost as far as the epithelium. 



The submucous coat consists of lax connective tissue, allowing the mucous 

 membrane to move freely on the muscular layer. It contains blood-vessels of con- 

 siderable size, a mesh-work of lymphatics, and the nerve-plexus of Meissner. 



The muscular coat comprises three layers, — an outer longitudinal, a middle 

 circular, and an imperfect inner oblique, — of which the middle one is the most 



