5 CONTENTS. 



CHAPTER III. 



PAGE 



THE CIRCULATORY OR VASCULAR SYSTEM 87 



The Heart ' 87 



The Arterial System 94 



The Aorta 96 



The Thoracic Aorta no 



The Abdominal Aorta in 



The Venous System 118 



Veins of the Head and Neck 121 



Veins of the Upper Extremities 124 



Veins of the Lower Extremities 126 



Veins of the Trunk 127 



The Portal Circulation 130 



The Pulmonary Circulation 130 



The Blood 131 



The Vascular System of the Fetus 138 



CHAPTER IV. 



\ THE RESPIRATORY SYSTEM 144 



The Lungs 145 



The Diaphragm 153 



CHAPTER V. 



1 THE DIGESTIVE SYSTEM . . . . 154 



The Esophagus and Stomach 162 



The Intestines 165 



The Lacteals 1 73 



The Thoracic Duct 175 



REGIONS OF THE ABDOMEN AND THEIR CONTENTS . . .177 



CHAPTER VI. 



. THE EXCRETORY SYSTEM 180 



The Kidneys 182 



The Ureters 186 



The Bladder . . . 186 



