CONTENTS 



CHAPTER PAGE 



I. THE HUMAN MECHANISM . , . . . 3 



II. THE STRUCTURE (ANATOMY) OF THE HUMAN MECHANISM 6 



III. THE FINER STRUCTURE OF Two TYPICAL ORGANS, 



GLANDS AND MUSCLES. THE CONNECTIVE TISSUES. 



THE LYMPHATIC SYSTEM 28 



IV. THE ORGANS AND CELLS OF THE BODY AT WORK . . 43 

 V. WORK AND FATIGUE ....'...;,..... 55 



VI. THE INTERDEPENDENCE OF ORGANS AND OF CELLS. 



INTERNAL SECRETIONS. . . ...... . . J . 63 



VII. THE ADJUSTMENT OR COORDINATION OF THE WORK OF 



ORGANS AND CELLS ...,...*.;. 69 



VIII. ALIMENTATION AND DIGESTION . . . . . . , . N . 91 



The Supply of Matter and Power to the Human Machine 91 



Digestion in the Mouth. Enzymes . 103 



Digestion in the Stomach 107 



Digestion and Absorption in the Small Intestine and in 



the Large Intestine 117 



IX. THE CIRCULATION OF THE BLOOD . . 135 



Blood and Lymph . ' 135 



Mechanics of the Circulation of the Blood and of the 



# Flow of Lymph '. 139 



The Adjustment of the Circulation to the Needs of 



Everyday Life . 152 



X. RESPIRATION 165 



XL EXCRETION .............'... 180 



XII. THERMAL PHENOMENA OF THE BODY 189 



The Constant Temperature 189 



The Regulation of the Body Temperature 199 



1* vii 



