CONTENTS xiii 



CHAPTER XVII. 



The Human Body and Its Food 338 



Chief Divisions of the Body. Cells and Tissues of the Body. 

 Structure of Bones. Joints. The Skeleton. Muscles and Tendons. 



Injuries to Bones and Muscles. Kinds of Food. Organs of Di- 

 gestion; Glands. The Mouth. The Teeth. The Swallowing of 

 Food. Exercises. The Stomach. Gastric Juice. The Intestines. 



The Liver. The Pancreas. Changes in Food by Digestion. 

 Absorption and Assimilation of Food. Storage of Food. Alcohol 

 and Its Effects. Summary. Exercises. 



CHAPTER XVIII. 



Circulation and Respiration 372 



Circulation of the Blood. The Heart. Arteries and Veins. 

 Capillaries. Blood. Lymph. Excretion. Respiration. The 

 Lungs. Exchange of Gases in the Lungs. Inspiration. Expira- 

 tion. Exercises. The Nostrils and Pharynx. The Larynx and 

 Trachea. The Voice. Speech. Care of the Organs of Respiration. 



The Skin. Perspiration. Hair and Nails. Functions of the 

 Skin. Summary. Exercises. 



CHAPTER XIX. 

 The Nerves and the Sense Organs 395 



The Nervous System. Nerve Cells and their Structure. The 

 Brain and its Parts. Spinal Cord. Sympathetic System. Nervous 

 System as a Whole. Voluntary and Involuntary Action. Reflex 

 Action. Habit. Effect of Alcohol and Tobacco on the Nerves. 

 Exercises. The Special Senses. Touch. Taste. Smell. Hear- 

 ing; Structure of the Ear. Sight. Eye Socket and Lids. Parts of 

 the Eye. Accoinmodaton. Near and Far Sight. Summary. 

 Exercises. 



CHAPTER XX. 



Sanitation 425 



Bacteria and their Relation to Disease. How the Body Resists 

 Bacteria. -Natural Destruction of Germs. Artificial Destruction 

 of Germs; Antiseptics. The Housefly and Mosquito in Relation to 

 Public Health. Exposed Food. Drinking Fountains. Typhoid 

 and Sewage. Exercises. Tuberculosis and its Cure. Spitting in 

 Public. Colds. Diphtheria. Antitoxins. Smallpox. Vaccina- 

 tion. Malaria and Yellow Fever. 'Quarantine. Disinfection. 

 Summary. Exercises. 



