CONTENTS 9 



SECTION V 

 THE LYMPH 



CHAPTER XXI 



Page 



Properties and Formation of Lymph . 233 



SECTION VI 

 RESISTANCE AND IMMUNITY 



CHAPTER XXII 

 The Blood and Lymph as Protective Mechanisms : . . 245 



PART III 



THE CIRCULATION OF THE BLOOD 



SECTION VII 



THE MECHANICS OF THE HEART 



CHAPTER XXIII 

 A Comparative Study of the Circulatory System 253 



CHAPTER XXIV 

 The Arrangement of the Musculature of the Heart , . 263 



CHAPTER XXV 

 The Cardiac Cycle (Revolutio Cordis) 272 



CHAPTER XXVI 

 The Phenomena Noted During Each Cardiac Cycle 280 



SECTION VIII 

 THE NERVOUS REGULATION OF THE HEART 



CHAPTER XXVII 

 Cardiac Inhibition and Acceleration 309 



SECTION IX 



FUNCTIONAL PECULIARITIES OF THE CARDIAC MUSCLE 



TISSUE 



CHAPTER XXVIII 

 The Origin of the Heart Beat 331 



