Fio. 27. THE RIGHT LUNG, AND AIR-PASSAGES or THE LEFT LUNG, 



, The J ra . chea or windpipe, b Bronchial tubes, c c c Three lobes of the ridit lung 

 d The inferior or concave surface of the right lung, e e e Air-passages of the left Jun| 

 or division and subdivision of the bronchial tubes S ' 



FIG. 28. THE HEART AND ITS BLOOD-VESSELS. 



