X CONTENTS. 



CHAPTER V. 

 OF ABSORPTION. 



Double Mechanism for Absorption. The Lacteals and Veins. Lacteal Absorption. Descrip- 

 tion of a Vittus. Analogies in Plants. Introduction of Fat by the Villi. The Chyle. 

 Causes of the Flow of Chyle,. Intermediate Changes on its Passage to the Blood. Action of 

 Peyer's Bodies. Lymphatic Absorption. Nature of Lymph. Structure of the Lymphatic 

 System. Comparison of Chyle, Lymph, and Serum. Function of the Lymphatic System. 

 Production of Fibrin. Cutaneous Absorption. Causes of the Flow of Lymph. Apparent se- 

 lecting power of the Absorbents. Connection of the Lacteals and Lymphatics with the Locomo- 

 tive and Respiratory Mechanism Page. 84 



CHAPTER VI. 

 ABSORPTION BY THE BLOOD-VESSELS. 



Proof of Absorption by the Blood Capillaries. Occurs as a physical Necessity. Nature of Cap- 

 illary Attraction. Its Phenomena in the Rise and Depression of Liquids. Conditions for 

 producing a Flow in a Capillary Tube. Passage of Liquids through minute Pores. General 

 Propositions respecting Capillary Attraction. Endosmosis and Exosmosis. They depend on 

 Capillary Attraction. Force against which these Movements may take place. Illustrations of 

 selecting Power. General View of the entire Function of Absorption, lacteal and venous.... 102 



CHAPTER VII. 

 OF THE BLOOD. 



The Offices and Relation of Blood in the System. The Plasma and Cells. General Properties 

 and Composition of the Blood. Quantity in the Body. Coagulation. Blood-cells. Their suc- 

 cessive Forms. The perfect Cell. Hozmatin : its Properties. Number of Blood-cells. Plas- 

 ma : its Composition, and Variations of its Ingredients. Albumen, Fibrin, Fat, Sugar. Min- 

 eral Ingredients of the Cells and Plasma compared. Gases of the Blood. ^Changes occurring 

 during the Circulation. General Functions of the different Ingredients of the Blood. Introduc- 

 tion of Oxygen by the Cells. Their transient Duration Ill 



CHAPTER Vm. 



OF THE CIRCULATION OF THE BLOOD. 



The Heart as a Machine. Inadequacy of Harvey's doctrine of the Circulation. Physical Prin- 

 ciple, of the Circulation ; applied in the case of a Nucleated Cell, Pervious Tissue, Motion of 

 Sap and of Blood. Dependence of the Circulation on Respiration. Forms of Circulation : 

 Systemic, Pulmonary, Portal. Description of the Heart ; its Movements.- Their Force, Num- 

 ber, and Value. Sounds of the Heart. Cause of its Contractions. Description of the Arte- 

 ries, Capillaries, Veins. Explanation of the Circulation of the Blood. Facts supporting it. 

 The First Breath , 129 



CHAPTER DL 

 OF RESPIRATION. 



Respiration introduces and removes aerial Substances. Coalescence of Respiratory and Urinary 

 Organs in Fishes. Physical and chemical Conditions of Respiration. Interstitial Movements 

 of Solids, Liquids, and Gases. Condition of Equilibrium in the Diffusion of Gases. Con- 

 densing Action of Membranes. Forms of Respiratory Mechanism. The Lungs of Man. 

 Three Stages in the Introduction of Air : Atmospheric Pressure, Diffusion of Gases, and 

 Condensation by Membranes. Exchange of Carbonic Acid for Oxygen. Divisions oftheCon- 



. tents of the Lungs. Variations in the expired Air. Removal of Water. Effect ofirrespira- 

 bk Gases. Experiments qfRegnault and Reiset. Nervous Influence concerned in Respiration. 

 Results of Respiration 149 



