TABLE OF CONTENTS XV 



PAGE 



CHAPTER V. The Blood 147 



1. The Amount of Blood in the Body 148 



2. The Formed Constituents of the Blood 148 



A. The Red Blood Corpuscles 148 



B. The White Corpuscles 153 



C. The Blood Platelets ..153 



3. The Plasma 154 



A. Chemical Constitution of the Plasma . ; 154 



B. Coagulation of Blood 157 



CHAPTER VI. Circulation of the Blood 161 



First Section: General Survey of the Blood's Movements 161 



Second Section: The Movements of the Heart 162 



1. The Form Changes of the Heart in Systole 162 



A. Structure of the Ventricular Wall . . .'.... . . .162 



B. The Form Changes of the Heart . . ... . . .163 



2. Regulation of the Blood Flow through the Heart 165 



A. The Atrio-ventricular Valves 165 



B. The Semilunar Valves 167 



3. The Heart Sounds . ... . .167 



4. Pressure Changes in the Heart During Its Activity 168 



A. Technique 168 



B. Pressure Variations in Different Chambers of the Heart . , . 169 

 5. The Apex Beat . . . . . . -..'.' . . . . .172 



6. Time Relations of the Cardiac Events . . . . . . . .176 



7. Filling of the Heart in Diastole . .... . . .176 



8. Power and Work of the Heart . . . .... . .177 



A. Power . . . . . . . . . . . . . .177 



B. Work . . . . . ... . . . . . .178 



9. Properties of Heart Muscle . ... . . . . . . 179 



A. The Nature of the Cardiac Contraction . . . . . . .179 



B. Nutrition of the Heart .180 



C. The Behavior of Heart Muscle under Direct Stimulation . . . 182 



10. The Cause of the Rhythmical Activity of the Heart 185 



11. The Efferent Cardiac Nerves . . . . . ...... . 188 



A. The Inhibitory Nerves . ... ... . . . . . .188 



B. The Accelerator Nerves . . . . . ..... . 191 



12. The Heart Reflexes 193 



13. The Cardiac Nerve Centers 195 



14. Rate of the Heart Beat 196 



Third Section: The Blood Flow 198 



1. The Flow of a Liquid in Rigid Tubes 198 



2. The Flow of a Liquid in Elastic Tubes 199 



3. The Flow of Blood in the Arteries .200 



A. Elasticity of Arterial Wall . 200 



B. Methods for the Determination of Blood Pressure . . . . . 202 



C. Height of the Blood Pressure . . 204 



D. Velocity of the Blood in the Arteries . . . . . . . 209 



4. The Arterial Pulse . .212 



A. The Movement of Waves in Elastic Tubes . .... ;" . . 212 



B. The Pulse ' . . . 214 



5. Final Survey of the Movements of the Blood in the Arteries . . . 218 



