KESPIKATIOK 



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in the elastic layer of the mucous coat. Numerous anasto- 

 mosing vessels proceed from the deep to the superficial 

 plexus (WATEES). These capillaries, especially in the 

 smaller bronchia, have their blood aerated in traversing the 

 mucous membrane, and terminate in the pulmonary veins. 

 The bronchial veins seem chiefly to originate from the walls 



Fig. 132 (HEALE] Shows the ramifications of the trunks of the sustinent arteries on 

 the external surface of the bronchial tubes natural size. 



of the larger bronchi, the bronchial glands, and other struc- 

 tures about the roots of the lungs, and follow an irregular 

 course to the asygos vein, into which they pour their blood 

 Heale describes other small venous trunks, proceeding from 

 the coats of the smaller bronchial tubes, the interlobular 



2 H 



