CONTENTS OF THE SECOND VOLUME. 



XV 



Amount of oxygen inhaled, 409 

 Exhalation of nitrogen, 410 

 Changes in the blood resulting from 

 respiration, 41 1 



Quantity of carbon removed from the 



body, 413 

 Theory of respiration, 414 



CHAPTER XXX. 



ANIMAL HEAT. 



Of the DEVELOPMENT OF HEAT in the 



body, 417 

 Development of heat in plants and 



animals, 418 



Temperature of fhe human body, 419 

 Influence of age, sleep, exercise, climate, 



and seasons, etc., upon the temperature 



of the body, &Q 



Loss of heat by evaporation, 422 

 Influence of food, 423 

 Influence of disease, 424 

 Hibernation, 425 

 Theory of animal heat, 425 

 Influence of the nervous system, 

 428 



CHAPTER XXXI. 



VOICE. 



The LARYNX THE ORGAN OF THE VOICE, 



431 



The cartilages of the larynx, 432 

 Vocal cords, 435 



Action of laryngeal muscles, 437 

 Nerves, 438 



Action of larynx and theory of vocali- 

 zation, 438 



Production of vocal sounds, 441 

 Chest voice, and falsetto, 442 

 Singing, 443 



Influence of nerves on voice, 443 

 Speech, 445 



CHAPTER XXXII. 



SECRETION. 



Of SECRETIONS AND EXCRETIONS, 447 

 Secretions not excrementitious, which 



serve ulterior offices, 449 

 Vicarious secretion, 450 

 Ingesta and egesta, 451 



Anatomy of secreting organs generally 



451 



Of the gland cell, 455 

 Of the ducts of glands, 456 



Of the PANCREAS, 459 

 Of the LIVER, 460 

 Chemical composition, 461 

 Lobules of the liver, 463 

 portal canals, 466 



CHAPTER XXXIII. 



SECRETING GLANDS. 



Portal vein, 467 

 Hepatic artery, 468 

 Duct, 469 



Parietal sacculi, 470 

 Gall bladder, 471 



