FEEDING FARM ANIMALS 



the leaf through the little mouths on the undersides 

 of the leaves. There these various compounds are 

 upset and disintegrated through the action of heat, 

 sunlight, protoplasm and chlorophyll, with the result 

 that a grain of starch is made out of the water and 



CARBONIC ACID 



CARBONIC ACID 



UNDERSIDE OF A LEAF 



When studied under the microscope the underside of a leaf appears as 

 sketched above. The letter a shows. the stomata or mouths, and b the cells 

 of the leaf. 



carbonic acid gas. Some of these starch grains are 

 changed by protoplasm into sugar, which, being 

 readily soluble, soon is transferred by diffusion from 

 cell to cell and left in those cells that need it the 

 most. 



How Plants Use Starch. Starch is not the life 

 substance of the plant, but helps to make it. It is 



