i6 5 8 



HUMAN ANATOMY. 



rupted layer of parallel tubules. The largest ones are in the rectum, where they 

 measure. 7 mm. (Verson). The lining of the glands is conspicuous on account of 

 the great number of goblet-cells, which in the middle and upper parts of the tubules 



FIG. 1406. 



Surface views of mucous membrane of ascending colon. A, natural size ; , magnified 30 diameters, showing orifices 



of Lieberkiihn's glands. 



often exist in such profusion that the ordinary cells are almost entirely replaced ; 

 towards the deepest part, or fundus, of the glands they are comparatively infrequent. 

 The presence of goblet-cells in such numbers accounts for the considerable amount 

 of mucus normally poured into the large intestine. 



FIG. 1407. 



Lieberkiihn's glands 



Solitary lymph-nodul 



Mucous coat 



u.liiia! -<< ti"ii <>f ascending; colon, showing general arrangement of coats and solitary lymph-nodule. X 3- 



The lymphatic tissue in definite collections occurs as solitary nodules only, 

 Payer's patches bein.y absent within tin- large intestine. The lymph-nodules, which 

 occupy a portion <>f the subnmcous coat as well as the mucosa, are largest and most 



