2O APPLIED PHYSIOLOGY 



practice. A tiny bit should be placed upon a slide and a 

 drop of water placed upon it, and the whole covered with 

 a cover glass. Begin to examine it with the lowest powers 

 of the microscope, and so gradually learn to use the higher 

 powers. 



SUMMARY 



1. Physiology tells how living beings eat and grow and act. 



2. The ameba is a tiny lump of living jelly, which eats, 



and moves, and produces young amebas. 



3. The body of a man is made of tiny cells like an army 



of amebas. 



4. Each cell is a lump of thick jelly, in which a small 



mass called the nucleus may usually be distin- 

 guished. The cells are held in place by strings 

 called connective tissue. 



5. Each cell moves, eats, and grows, and produces other 



cells like the first. 



6. The mind lives in the body formed by the cells. 



7. The cells obey the mind. When the mind loses con- 



trol of them the body is dead. 



8. Each cell does some special kind of work for the 



benefit of the rest. 



9. A collection of cells doing a special kind of work is 



called a tissue. 



10. A collection of different tissues always arranged in a 



definite and compact shape is called an organ. 



11. A definite series of tissues and organs scattered 



through the body for a definite purpose forms a 

 system. 



DEMONSTRATIONS 



i. Scrape the inside of the cheek with a sharp knife and examine 

 a drop under the microscope, with a power of at least 100 diameters. 



