iSAl^ 1 JiKlJV AINU JJJ.SJl.AbJS. 



posing a system, other groups composing other 

 systems suffer also. 



The group of cells from which the muscular . . , 

 system is made up, by its united action, called Various Cells, 

 into play by nerves, produce our movements. 

 Another group of cells forms the liver and har- 

 monious action of this group is necessary in 

 order that impurities be removed from the 

 blood. Certain fluids which are essential to the 

 welfare of the body are also manufactured by 

 this group. The brain is composed of another 

 group of cells of a different type; from this 

 group thought and intelligence emanate, and Nerve Cells. 

 from still another group is composed the nerves 

 which convey messages to and fro between the 

 brain and the outer world and so on. When 

 these various groups are all "in tune" then the 

 human body is in a state of health, when they 

 are "out of tune," we speak of the body as in a 

 state of disease. In a state of disease our work 

 is no longer a pleasure to us; our hours of 

 recreation are no longer a joy. Our days are 

 filled with discomfort and our nights are robbed 

 of rest and sweet sleep. 



As nurses, then, let us grasp this thought that ^ „ . . 



. , f , Definition of 



disease is a derangement of the structures or Disease. 



functions of the body," and in order that the 



human structure remain healthy, there must be 



harmonious action between separate types or 



groups of cells. If one group fails to work 



29 



