8 CONTENTS. 



PAGE 



of Taste, 61 Salivary Glands, 61 The Tonsils, 62 

 The Ear, 63 Eustachian Tubes, 63 Sensation of 

 Hearing, 65 The Eye, 66 Lachrymal Gland, 68 

 Coats of the Eye, 68 Light Rays and Sight, 70 Ac- 

 commodation, 72 Color Perception, 73. 



CHAPTER V. 



THE NERVOUS SYSTEM 75 



The Cerebrum, 75 The Cerebellum, 78 Pons Variolii, 

 78 Medulla Oblongata, 78 Spinal Cord, 79 Brain- 

 centers, 81 Motor Tract, 82 Sensory Tract, 82 Re- 

 flex Action, 83 Cranial Nerves, 83 Spinal Nerves, 84 

 Brachial Plexus, 85 Sacral Plexus, 85 The Sym- 

 pathetic System, 87 The Sympathetic Nerves, 87. 



CHAPTER VI. 



THE BACK 83 



The Spine, 88 The Vertebrae, 88 Muscles of the Neck, 

 92 Muscles of the Back, 93. 



CHAPTER VII. 



THE CHEST 98 



The Sternum, 97 The Ribs, 97 Costal Cartilage *, 

 98 Muscles of the Chest, 98 Diaphragm, 98 

 Mammary Glands, 100. 



CHAPTER VIII. 



THE HEART AND CIRCULATION 101 



The Heart, 101 The Pericardium, 101 Cavities of the 

 Heart, 103 The Endocardium, 103 The Valves of 

 the Heart, 103 Circulation, 105 Circulation in the 

 Fetus, 106 Arteries, 107 Veins, 109 Portal Circu- 

 lation, 109 Pulmonary Circulation, 110 Nerves of the 

 Heart, 110 Heart Sounds, 111 The Heart Beat, 

 111 Factors Affecting Circulation, 112 The Pulse, 

 113 Blood Pressure, 114 Nerve Supply of the Blood- 

 vessels, 115 The Blood, 116 Composition of the 

 Blood, 116 Coagulability of the Blood, 117 Blood- 

 corpuscles, 118. 



CHAPTER IX. 



THE LUNGS AND RESPIRATION 121 



The Larynx, 121 The Trachea, 123 The Thyroid 

 Gland, 124 The Thymus Gland, 124 The Bronchi, 

 125 The Lungs, 125 The Pleura, 125 The Medias- 

 tinum, 126 Respiration, 127 Air, 129 Respiratory 

 Sounds, 129 Changes in Air in Lungs, 129 Effect of 

 Respiration on Blood, 130 Nervous Mechanism of 

 Respiration, 130 Variations in Respiration, 131. 



