SECRETING GLAXDS. 



CCXXlll 



smallest lobules (n) consist of two or three groups of saccules, with a like 

 number of ducts, joining into an immediately larger ramuscule (o), -which 

 issues from the lobule ; and a collection of the smallest lobules, united by 



Fig. CXX VI II. PLANS OP EXTENSION OP SECRETING MEMBRANE, BY INVERSION OB 

 RECESSION IN FORM OF CAVITIES. 



A, simple glands, viz., g, straight tube ; 7t, sac ; i, coiled tube. B, multilocular 

 crypts ; k, of tubular form ; I, saccular. C, racemose, or saccular compound gland ; m, 

 entire gland, showing branched duct and lobular structure ; n, a lobule, detached with 0, 

 branch of duct proceeding from it. D, compound tubular gland. 



connective tissue and vessels, forms one of the next size, which, too, has 

 its larger branch of the duct, formed by the junction of the ramuli be- 

 longing to the ultimate lobules. In this way, the whole gland is succes- 

 sively made up, the number of its lobules and of the branches of its duct 

 depending on its size ; for whilst some glands of this kind, like the parotid 

 and pancreas, consist of innumerable lobules, connected by a large and 

 many-branched duct, others, such as the duodenal glands of Brunuer and 

 many mucous glands, are formed of but two or three ultimate lobules, or 



