144 



THE ESSENTIALS OF HISTOLOGY 



pass to the organ along its curvatures. The arteries pass through the 

 muscular coat, giving off branches to the capillary networks of the 

 muscular tissue, and ramify in the areolar coat. From this, small 

 arteries pierce the muscularis mucosae, and break up into capillaries 

 near the bases of the glands. The capillary network extends between 

 the glands to the surface, close to which it terminates in a plexus of 



if. 



FlG. 175. A PYLORIC GLAND, 

 FROM A SECTION OF THE 

 DOG'S STOMACH. 



m, mouth ; n, neck ; tr, a deep por- 

 tion of a tubule cut transversely. 



FIG. 176. PLAN OF THE BLOOD- 

 VESSELS OF THE STOMACH. 



, small arteries passing to break up 

 into the fine capillary network, d, 

 between the glands ; 6, coarser 

 capillary network around the 

 mouths of the glands ; c, c, veins 

 passing vertically downwards from 

 the superficial network ; e, larger 

 vessels in the submucosa. 



relatively large venous capillaries which encircle the mouths of the 

 glands. From this plexus straight venous radicles pass through the 

 mucous membrane, pierce the muscularis mucosas, and join a plexus -of 

 veins in the submucous tissue. From these veins blood is carried 

 away from the stomach by efferent veins, which accompany the enter- 

 ing arteries. 



The lymphatics (fig. 177) arise in the mucous membrane by a 



