22 APPLIED BIOLOGY 



The science of minute structure as studied with the aid of 

 the microscope is called microscopical anatomy or histology. 

 The science of life-activities or functions of living things is 

 called physiology; and there are special books devoted to 

 the sciences of plant physiology, animal physiology, and 

 human physiology. The sciences named in the foregoing 

 are simply subdivisions or departments of the great science 

 of living things, biology. 



