Vi CONTENTS. 



THE BLOOD Continued. 



PAGE 



Physical and Chemical Characters of Red Blood-Cells . . - . . 75 



The White Corpuscles, or Blood-Leucocytes 79 



Chemical Composition of the Blood , 83 



The Serum 85 



Variations in Healthy Blood under Different Circumstances ... 86 



Variations in the Composition of the Blood in Different Parts of the Body 87 



Gases contained in the Blood 88 



Blood-Crystals 91 



Development of the Blood 96 



Uses of the Blood 99 



Uses of the various Constituents of the Blood 99 



CHAPTER V. 



ClKCTJLATION OF THE BLOOD 101 



The Systemic, Pulmonary, and Portal Circulations 102 



The Forces concerned in the Circulation of the Blood .... 103 



THE HEART 103 



Structure of the Valves of the Heart Ill 



The Action of the Heart . . . . Ill 



Function of the Valves of the Heart 112 



Sounds of the Heart . . . . 117 



Impulse of the Heart . . . .119 



The Cardiograph 119 



Frequency and Force of the Heart's Action ...._.. 122 



Influence of the Nervous System on the Action of the Heart . . . 124 



Effects of the Heart's Action . . 127 



THE ARTERIES. CAPILLARIES, AND VEINS 128 



Structure of the Arteries 129 



Structure of Capillaries . 133 



Structure of Veins . . .... . . . . . 136 



Function of the Arteries . .... . . . . . 138 



The Pulse 142 



Sphygmograph . . 143 



Pressure of the Blood in the Arteries, or Arterial Tension . . .148 



The Kymograph . . . . ..... . . . 150 



Influence of the Nervous System on the Arteries . , . . . 152 



Circulation in the Capillaries . . . . . . . . 158 



Diapedesis of Blood-Corpuscles . ... . . . . . 159 



CIRCULATION IN THE VEINS . , 161 



Blood-pressure in the Veins , . . .162 



Velocity of the Circulation ... . . . . . .163 



Velocity of the Blood in the Arteries . 164 



Capillaries 165 



Veins . . 165 



Velocity of the Circulation as a whole ....... 166 



