TABLE OF CONTENTS. 



PAGE 



Introduction, 1 



PART I. 



GENEBAL PHYSIOLOGY. 



The Physiology of Animal Cells. 



SECTION I. 



The Structure op Organized Bodies. 



I. The General Properties of Cells, 12 



II. The Origin of Cells, . . . . . . . .14 



III. The Modification in the Form op Cells, .' . . . 26 



IV. The Development of Tissues and Organs, .... 31 



SECTION II. 

 Cellular Physics. 



I. The Physical Processes in Cells, 37 



1. Cohesion, 38 ; 2. Adhesion, 40 ; 3. Capillarity, 40 ; 4. Solution, 43 ; 

 5. Imbibition, 44 ; 6. Filtration, 48 ; 7. Diffusion of Liquids, 49 ; ' 

 8. Osmosis, 51; 9. Diffusion of Gases, 56 ; 10. Absorption of Gases, 

 58. 



II. The Physical Properties of the Tissues, .... 61 



1. Cohesion, 62 ; 2. Elasticity, 65 ; 3. Optical Characteristics, 68 ; 4. 

 Electrical Phenomena, 70. 



III. Mechanical Movements in Cells, 10 



1. Motion Produced by Imbibition in Cells, 70 ; 2. Protoplasmic Move- 

 ments, 72 ; (1) Movements in Protoplasmic Contents of Cells, 

 73 ; (2) Ciliary Movement, 77 ; (3) Movement in Specialized 

 Contractile Tissues, 81. 



General Conditions Governing Protoplasmic Movement, . . 82 

 1. Temperature, 82; 2. Degree of Imbibition, 82; 3. The Supply of 

 Oxygen, 83; 4. Various Chemical and Physical Agents, 84. 



(vii) 



