360 



THE HUMAN MACHINE 



Finger prints of the same area in three 

 different persons. 



hand, you will notice that it is thrown into many tiny 

 ridges. These have no particular pattern and they are so 



individual in different 

 persons that finger prints 

 made by pressing these 

 ridges on an ink pad and 

 then on paper are used 

 for purposes of identifica- 

 tion, for each person's 

 finger prints are different 

 from each other person's. 

 If you could examine a bit of your skin with a micro- 

 scope, you might find many tiny holes which open on its 

 surface. These are the openings of the sweat glands, 

 tiny groups of cells which take water and wastes from 

 the blood. We perspire when we are warm, and, as 

 a matter of fact, the 

 water which passes 

 out not only carries 

 wastes from the blood, 

 but also gets rid of 

 some heat. Since these 

 tiny pores are very 

 important in the regu- 

 lation of our body 



cfglcmct 



temperature, we must 

 not allow them to be- 

 come clogged with dirt 

 or grease. The fre- 

 quent use of soap and 

 water is necessary, es- 

 pecially after working 

 in a dusty or grimy 



r>lflpp if WP rp tn kppr A sweat gland showin S its position in the skin. 

 ,6, It We )Keep C an you find the outer dead layer? Wastes are 



the pores Open. passed out through the mouth of the gland. 



