250 



HITCHCOCK'S ANATOMY 



Fig. 251. 



Capillaries of the Human Lung. 



of a circle, the remaining; sixth consisting of smooth or invol- 

 untary muscular fiber. 



442. The Bronchi. — Inter cellular Passages. — Crcca) 

 Air -Cells. Their Number. — As soon as the Bronchi fairly 



Fig. 252. 



A Magnified "View of a Section of the Lung, showing the Arrangement of some of 

 the Lobules, the Communication of the Air-Colls in one Lobule and their Separation 

 from those of the adjoining Lobule. The Ramifications of the Blood- Vessels in the 

 Texture of the Tiling and their Course through the Air-Cells are also seen. 1, 1, 

 Branches of the Fulmonary Veins. 2, 2. Branches of the Pulmonary Artery. 



