20 



costal muscles, diaphragm. Muscles of the neck. Muscles 

 of the shoulder. 



Contents of the chest. The two lungs. The two pleura. The 

 heart. The pericardium, 



Structure of the lungs. Trachea. Bronchia. Air-cells. Re- 

 marks on organs of voice. 



Mechanism of breathing. Practical exemplification. Condi- 

 tion of the air on its entrance and exit. Condition of the 

 blood on its entrance and exit. 



Evils of compression of the chest and abdomen. Remarks on 

 errors of dress. Effects of lacing on health and on beauty. 

 Distortion of features. Inflammation of the eyes. Head- 

 ache. 



Evils of exercise in close rooms. False notions of the duty of 

 woman. 



Effects of anthracite fires on health and beauty. Means of 

 correction. 



The Human Heart. Man has four hearts; two venous and two 

 arterial: The RIGHT AURICLE and the RIGHT VENTRICLE, 

 are venous hearts. The LEFT AURICLE and the LEFT 

 VENTRICLE are arterial hearts. 



Structure of the human hearts. Their valves. Muscles of 

 the valves. 



Description of the rout of circulation. Blood passes from the 

 organs to the right auricle; from the right auricle to the 

 right ventricle; from the right ventricle to the lungs; from 

 the lungs to the left auricle; from the left auricle to the 

 left ventricle; from the left ventricle to the organs. 

 Vessels of pure blood supplying the nourishment to the lungs 

 and the heart itself, unconnected with the pulmonary ves- 

 sels. 



LECTURE XII. 

 Apparatus of Circulation continued. The Msorbent System. 



Position of the Heart in the Thorax. 



Proximity of the gullet, the bronchia, the great vessels, the 

 diaphragm, the stomach and the heart; hence confusion in 



