_ 82 - LEAF-ABSORPTION. 



10. Entrance of carbon dioxide into the leaf. Typical stomafca seen under the 

 microscope, in surface view and in section. 



11. Passage of carbon dioxide inside the leaf to the cells where it is absorbed. 



(a) Air-spaces between cells seen in a section under the microscope. 

 (6) Continuous connection of the air-spaces shown by sucking air through 

 a leaf. 



