48 



HISTOLOGY. 



alveoli, into simple and compound tubular or alveolar glands 

 (Fig. 26). 



In tubular glands the simple tubule always ends blindly, and 

 may be coiled and form a coil gland ; or it divides dicliotomously 

 and forms a simple branched tubular gland. A compound 

 tubular gland consists of several tubules which divide and may 



FIG. 26. 



Tubular glands. 



Alveolar glands. 



Diagram of various forms of glands: a, duct; x, simple tubule; xx, simple alveolus. 



become convoluted. Each of these possesses a duct which opens 

 into the main duct of the gland. In compound glands the duct 

 divides, while in the simple glands this is not the case. In 

 simple glands there may be a division of the secreting gland 

 body, giving rise to a, simple branched gland. 



The branches of tubular glands may anastomose with one 

 another (e.g., in the kidney). Indeed, the anastomosis may be 



