USEFUL REFERENCES 323 



IV. Muscles (16) usually work in pairs; (17) are usually attached 

 to bones, which act as levers; (18) never give form to the body; 

 (19) are capable of contraction and relaxation ; (20) are only fully devel- 

 oped in people who exercise. 



V. Good posture (21) comes as a result of a proper balance or 

 equilibrium of body parts; (22) is the result of round shoulders; 

 (23) is an indication of good mental as well as physical health ; (24) is 

 not necessary for health ; (25) may be obtained through proper exer- 

 cise and care of the body. 



Achievement Test 



1. What is the general plan of man's body make-up? 



2. What would you do in case of a skin infection? 



3. What are the functions of each part of the skin? 



4. How could you show the ways in which the leg muscles work in 

 walking? In running? In jumping? 



5. How would you protect yourself from foot troubles ? 



Practical Problems 



1. Visit a museum and make a series of diagrams for your workbook 

 to show the relationship of man to the other mammals. 



2. Study diagrams and the foot of the human skeleton in order to 

 locate the arches in your foot. Make an impression of the foot on 

 smoked paper and decide if your arches are in good condition. What 

 exercises should you take if they are not ? (See the Metropolitan Life 

 Insurance pamphlet, " Foot Health.") 



3. Prove that a given bone acts as a lever for certain muscles in 

 your body. 



4. What first aid would you administer for a broken bone in your 

 leg? For a bad scratch made by a rusty nail? 



Useful References 



Hunter, Laboratory Problems in Civic Biology, pp. 93-96 inclusive. 



(American Book Company.) 

 Kimber and Gray, Textbook of Anatomy and Physiology. Chapters 



IV-VI inclusive. (The Macmillan Co. 1926.) 

 Metropolitan Life Insurance Company, Foot Health. 

 Walter, Human Skeleton. (The Macmillan Co. 1918.) 

 Williams, Personal Hygiene Applied. Chapter VI. (W. B. Saunders 



Co. 1925.) 



