3 TON If LIVING THIN< - 33 



must enter into the composition of the food sub- 

 I M are found in living matter. The simplest plants and 

 animals have this wonderful power as certainly developed as the 

 omplex forms of life. 



(5) Protoplasm, be it in the body of a plant or of an animal, uses 

 oxygen. It breathes. Thus substances taken into the body are 

 oxidized, and release energy for movement and the other activi- 



of plants and animj4^ 



(6) Protoplasm has the power to rid itself of waste materials, 

 illy those which might be harmful to it. A tree sheds its 



-.and as a result gets rid of the accumulation of mineral matter 



in the leaves. Plants and Animals alike pass off the carbon dioxide 



which results from the very processes of living, the oxidation of 



parts of their own bodies. Animals eliminate wastes containing 



lirough the skin and the kidneys. 



Protoplasm can reproduce, that is, form other matter like itself. 



plants are constantly appearing to take the places of those 

 that die. The supply of living things upon the earth is not de- 

 creasing; reproduction is constantly taking place. In a general 



t is possible to say that plants and animals reproduce in a 

 very similar manner. We shall study this more in detail later. 



~um up. we find that living protoplasm has the properties 



.-ibility. motion, growth, and reproduction alike in its sim- 

 plest state as a one-celled plant or animal and as it enters into 

 the composition of a highly complex organism such as a tree, a 

 dog, or a man. 



BOOKS FOR 



Sharpe, A Laboratory Manual. American Book Company. 



Atkinson. First Studies of Plant Life. Chap. XI. Ginn and Company. 



f Chemistry of Plant and Animal Life. The Macmillan Company. 



Coulter. Barnes, and Cowlea, A Textbook of Botany, Part IL American Book C< 



pany. 



Goodale. Physiological Baton*. American Book Company. 

 Green, Vegetable Physiology. J. and A. Churchill. 



Parker. An Elementary Course in Practical Biology. The Macmillan Company. 

 Sedgwick and Wilson. General Biology. Henry Holt and Company. 



rn. General Physiology. The Macmillan Company. 



Wilson, Tkf Cell in Development and Inheritance. The Marniillan Company. 

 HUNT. ES. BIO. 3 



