i INTRODUCTION 3 



the various parts, is called human anatomy. The body 

 is made up of many different parts called organs, as the 

 heart, liver, stomach, eyes, etc. The clock in the room 

 has hands, a case, a dial, a mainspring, etc. These are 

 all facts of anatomy. Can you mention others ? Give 

 something of the anatomy of a jackknife, of a school 

 desk, of a shoe. 



4. Physiology. The science which deals with the 

 uses or functions of the various parts of the body is called 

 human physiology. The teeth are for the purpose of 

 cutting and grinding foods ; the stomach helps to pre- 

 pare foods for the blood ; and the skin serves to protect 

 the body from foreign objects. The hands of the clock 

 indicate the time of day ; the key is for winding the 

 clock ; and the case contains the works and protects 

 them against dust and other harmful substances. These 

 are facts of physiology. 



5. Hygiene. The science which deals with the care 

 of the various parts of the body or with the laws of health 

 is called personal hygiene. The teeth should be prop- 

 erly cleaned daily ; our meals should occur at regular 

 intervals and at the same hour each day ; the foods 

 should be well cooked and thoroughly chewed ; and the 

 skin should be kept clean by frequent bathing. The 

 clock should be wound at the same time daily ; and 

 should be kept in a dry, clean, safe place. These are 

 statements of hygiene. 



We shall learn in this book many of the important 

 laws of health, so that we shall be able to do those 

 things which will make us strong and keep us well. 



