x CONTENTS 



PAGE 



CHAPTER XIV 



THE HYGIENE OF THE CIRCULATION 



Vasomotor control of blood distribution Control by heart 

 beat Faulty distribution Effects of eating Causes of 

 sleeplessness Effects of alcohol External pressure In- 

 juries Inflammation Bleeding from arteries From 

 veins " Poor " circulation Fainting 157 



CHAPTER XV 



RESPIRATION 



Air supply of the body Nose as an air passage Trachea 

 Larynx Bronchial tubes Air sacs Structure of lungs 

 Membrane covering lungs Relation of lungs to chest cav- 

 ity Air movement Inspiration Expiration Amount 

 of air breathed Lungs filled by air pressure Rapidity 

 of breathing Effects of exercise Effects of severe exer- 

 cise Adjustment of respiration and circulation to exer- 

 cise Effect of training 165- 



CHAPTER XVI 



THE HYGIENE OF RESPIRATION 



Effects of respired air Odor a test of impurity Amount 

 of fresh air required Ventilation Heating Direct 

 method Use of windows for ventilation Indirect 

 method Humidity Relation of humidity to ventilation 

 Drafts Relation of clothing to ventilation Night 

 air Malaria Dust, a source of disease Coughing 

 Sewer gas Care of nose Catarrh Adenoids Enlarged 

 tonsils 182 



CHAPTER XVII 



THE REMOVAL OF WASTE PRODUCTS 



Kidneys Blood supply Structure Excretion Effect upon 

 blood Importance of the kidneys Excretion by the 

 skin Uses of perspiration 19fr 



CHAPTER XVIII 



THE SKIN 



The skin, a protection The skin, a sense organ Structure 

 Pigment cells Color of the skin Dermis Connective 



