BOTANY, 



PART I. 



DEVELOPMENTAL BOTANY 



INTRODUCTION. 



NATURE may be divided into three kingdoms, mineral 

 vegetable and animal. The mineral kingdom is made up of 

 inorganic bodies which possess neither life nor sensibility. 

 The vegetable kingdom is made up of plants, which possess 

 life and sensibility. The animal kingdom is made up of 

 animals, which possess life and sensibility together with 

 voluntary motion. 



Masses of living matter are extremely variable in size and 

 form. To realize this fact you have only to think of such 

 familiar living things as a tree, a humming bird and a wh^le. 

 Individual masses of living matter are organisms. 



Organisms are composed of organs. The organs of the tree 

 are roots, stems* and leaves, each of which performs certain 

 functions. The root fixes the plant and absorbs water con- 

 taining inorganic and organic food material. The stem con- 

 ducts the liquid upward to the leaves. The leaves manu- 

 facture living substance and provide food for the plant. 

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