GENERAL SCHEME 



275 



walls of the intestine (ALC.). The waste matter is eliminated, 

 as we have seen, by a capillary mechanism in the kidney. Chemical 



FIG. 58. Vertical Mesial Section through Heart to show Aortic and Mitral Valves. 

 P.V ., right ventricle ; L.V., left ventricle with papillary muscle ; L.A., left auricle 

 with the mitral valve extending into the left ventricle ; Ao., aorta with anterior cusp 

 on top of septum. 



(Noel Paton's Essentials of Human Physiology.) 



CAP 



ART. 



FIG. 59. Scheme of the Circulation. S.H., systemic heart sending blood 

 to the capillaries in the tissues, Cap. The blood brought back by veins, and the 

 exuded lymph by lymphatics, Ly., passing through glands ; blood sent to the ali- 

 mentary canal, ALC., and from that to the liver, Liv . ; blood also sent to the kidneys, 

 Kid. ; the blood before again being sent to the body is passed through the lungs by 

 the pulmonic heart, P.H. 



(Noel Paton's Essentials of Human Physiology.) 



changes occur on the passage of the blood through the capillaries 

 of certain factories, e.g. liver and spleen. The loss of oxygen is 



