Xli CONTENTS. 



CHAPTER XVII. 



THE NERVES OF THE HEART AND SOME PHYSIOLOGICAL 

 PECULIARITIES OF CARDIAC MUSCLE. 



The coordination of heart and blood-vessels. Physiological peculi- 

 arities of cardiac muscle. The beat of the frog's heart. Heart- 

 beat not tetanic. Ventricular contraction always maximal. 

 Extrinsic nerves of mammalian heart. Cardio-inhibitory fibres. 

 The arterial manometer. The cardio- inhibitory centre. The 

 cardio-accelerator nerves. The iniluence of temperature 

 changes and of calcium salts on the heart-beat 253 



CHAPTER XVIII. 

 THE VASO-MOTOR NERVES AND NERVE-CENTRES. 



The nerves of the blood-vessels. Vaso-constrictor nerves. Vaso- 

 constrictor centre. Blushing. Taking cold. Vaso-dilator 

 nerves and centre. Vascular phenomena of inflammation . . . . 273 



CHAPTER XIX. 

 THE SECRETORY TISSUES AND ORGANS. 



Organs of secretion. Glands. Physical processes in secretion. 

 Chemical processes of secretion. Mode of activity of secretory 

 cells. Influence of nervous system on secretion. Secretion by 

 the subrnaxillary and parotid glands. ......, 282 



CHAPTER XX. 

 THE INCOME AND EXPENDITURE OF THE BODY. 



The material losses of the Body. The losses of the Body in energy. 

 The conservation of energy. Potential and kinetic energy. The 

 energy of chemical affinity. Relation between matters removed 

 from the Body and energy spent by it. Conditions of oxidation 

 in the living Body. The fuel of the Body. Utilization of en- 

 ergy in the living body 399 



CHAPTER XXI. 

 FOODS. 



Foods as tissue-formers. The food of plants. Non-oxidizable foods. 

 Definition of foods. Conditions which a food must fulfil. Pro- 

 teid or albuminous alimentary principles. Albuminoid or gela- 

 tinoid alimentary principles. Hydrocarbons. Carbohydrates. 

 Inorganic foods. Mixed foods. Flesh. Eggs. Milk. Veg- 

 etable foods. Alcohol. Advantage of a mixed diet 313 



CHAPTER XXII. 

 THE ALIMENTARY CANAL AND ITS APPENDAGES. 



General arrangement. Subdivisions of alimentary canal. Mouth. 

 Teeth. Tongue. Salivary glands. Fauces. Pharynx. CEsoph- 



