x CONTENTS. 



CHAPTER XV. 



THE WORKING OF THE HEART AND BLOOD-VESSELS. 



The beat of the heart Events occurring in each beat Use of the 

 papillary muscles Sounds of the heart Function of the 

 auricles Work done daily by the heart The pulse Blood- 

 flow in capillaries and veins Why there is no pulse in these 

 vessels The muscles of the arteries Taking cold Bathing 

 Appendix 216 



CHAPTER XVI. 



THE OBJECT AND THE MECHANICS OP RESPIRATION. 



The object of respiration The respiratory apparatus The 

 windpipe Bronchitis The lungs The pleura Pleurisy 

 Why the lungs remain expanded How the air is renewed 

 in the lungs The respiratory movements The respiratory 

 sounds Hygienic remarks Appendix 233 



CHAPTER XVII. 



THE CHEMISTRY OP RESPIRATION AND VENTILATION. 



The quantity of air breathed daily Changes produced in the air 

 by being breathed Ventilation When breathed air be- 

 comes unwholesome How to ventilate Changes under- 

 gone by the blood in the lungs Appendix 250 



CHAPTER XVIII. 



THE KIDNEYS AND THE SKIN. 



General arrangement of the nitrogen-execreting organs Gross 

 structure of the kidney Histology of the kidney The 

 renal secretion The skin Hairs Nails The sweat glands 

 The sebaceous glands Hygiene of the skin Bathing 

 Appendix 261 



CHAPTER XIX. 



WHY WE NEED A NERVOUS SYSTEM ITS ANATOMY. 



The harmonious co-operation of the organs of the body Co- 

 ordination Nerve trunks and nerve centres The cerebro- 

 spinal cent-re The spinal cord The bruin The cranial 

 nerves The sympathetic nervous system The histology of 

 nerve centres and nerve trunks Appendix 279 



