BLOODVESSELS OF PETER'S PATCHES. 



599 



through the glandular layer, and discharge themselves, like 

 those of the stomach, into a wide-meshed plexus of large veins 

 in the deepest layers of the mucous membrane. 



SOLITARY GLAND FOLLICLES AND PETER'S PATCHES. 



These obtain their vascular supply from the submucous 

 plexus of the intestine. The arterioles destined for the follicles 

 proceed in part directly from the branches of the submucous 

 plexus, and are partly branches of those trunks which break 

 up into capillaries for the layer of tubular glands. The former 

 chiefly run towards the base, the latter to the lateral surfaces 

 of the follicles. The capillary system (fig. 118) consists of a 



Fig. 118. 



Fig. 118. Vascular plexus of an intestinal follicle, seen in vertical section, 



plexus of vessels having a diameter of about 0*008 of a 

 millimeter, with rounded polygonal meshes, which invests 

 the whole surface of the follicle. From this plexus numerous 

 fine capillary branches of 0'004 0'006 of a millimeter in 

 diameter pass radially into the interior of the follicle. Near 

 the centre they form communicating arches, not, however, 

 with much regularity, since it frequently happens that three 

 or more join to form one. Moreover, some few anastomosing 



