148 



ANATOMY FOR NURSES. [CHAP. XII. 



pied by reticular or lymphoid tissue, 1 the fine meshes of which 

 are filled with leucocytes. Between this pulpy substance of the 

 gland and the skeleton framework there is a narrow space (left 

 white in the diagram) which looks as if the pulp had originally 

 filled the framework and then shrunk away slightly on all sides. 

 The spaces thus left form channels for the passage of the lymph, 

 which, entering the more convex surface by afferent vessels, 

 issues, after circulating through the gland, by efferent vessels 

 below. In its passage through the gland the lymph takes up 

 fresh leucocytes,, which are continually multiplying by cell 

 division in the glandular substance. The lymphatic glands are 

 plentifully supplied with blood. 



Solitary follicles and Peyer's patches. Closely connected with 

 the lymphatic vessels in the intestines are small, rounded bodies 



FIG. 104. VERTICAL SECTION OF A PORTION OF A PETER'S PATCH, WITH LAC- 

 TEAL VESSELS INJECTED, a, villi, with their lacteals coloured black ; d, surface of 

 rounded follicle, or solitary gland ; e, central part; /, g, h, i, and k, lymph-channels, 

 or lacteal vessels, coloured black. 



of the size of a small pin's head, called solitary glands or follicles. 

 These bodies consist of a rounded mass of fine lymphoid tissue, 

 the meshes of which are crowded with leucocytes. Into this 

 mass of tissue one or more small arteries enter and form a 



1 Reticular or lymphoid tissue is that variety of connective tissue in which 

 the branched connective tissue cells unite to form delicate networks. The 

 meshes of the network are occupied by fluid in which the leucocytes often, in 

 large numbers, wander to and fro. 



