FOOD COMPOSITION 203 



Eggs contain a large percentage of sodium, calcium, iron, phos- 

 phorus and chlorin. 



It will be seen that grains, fruits, and vegetables takevup the 

 various necessary minerals from the earth, forming compounds for 

 animal life to assimilate from its food. 



The skins of baked potatoes contain valuable mineral matter 

 which may be used by the body. 



Elements of the Human Body. A man weighing 160 pounds 

 possesses in his body about 



45 pounds of carbon, 

 15 pounds of hydrogen, 

 90 pounds of oxygen, 

 3| pounds of calcium, 

 1J pounds of phosphorus 

 1J pounds of chlorin, 

 3f ounces of sulphur, 

 3f ounces of fluorine, 

 3 ounces of potassium, 

 2J ounces of sodium, 

 2 ounces of magnesium, 

 1J ounces of iron, 

 1 ounce of silica, 

 J ounce of manganese. 



About 60 to 70 per cent of the human body is made up of water. 

 (Hydrogen and Oxygen.) 



FOOD COMPOSITION AND USE IN THE BODY 



Kind. Composed of. Use. Food Chiefly Found in 



Carbon 



Proteids 



Hydrogen 

 Nitrogen 

 Sulphur 

 Phosphorus 

 (sometimes) 



Build tissues 



White of eggs, curd ' of 

 milk, lean meat, glu- 

 ten of wheat; fish, 

 chicken, etc. 



{Carbon j For producing ( Butter, olive oil, oils 



Hydrogen Y heat or for \ of corn and wheat, 



Oxygen J storing as fat. I cheese, fat meat, etc. 



