THE CIRCULATION OF THE BLOOD 155 



Experiment 45. To illustrate the effect of muscular exercise in 

 quickening the pulse. Run a short distance. Count the pulse both 

 before and after. Note the effect of 

 running upon the rate. 



Experiment 46. To hear the sounds 

 of the heart. Borrow a stethoscope from 

 some 'physician and listen to the heart 

 beat of a friend. Note the sounds of 

 your own heart in the same way. 



Experiment 47. To find the pulse. 

 Grasp the wrist of a friend, pressing 

 with three fingers over the artery, and- 

 note the pulse. Press three fingers over 

 the radius in your own wrist, and note 

 the pulse. 



Count by a watch the rate of your 

 pulse per minute, and do the same with 

 a friend's pulse. Compare its character 

 with your own. 



214. How Alcohol gets into the 

 Blood. Alcohol passes into the 

 blood by two distinct routes. When 

 an alcoholic liquor is taken into the 

 stomach, some of it at once soaks 

 through the coats of the tiny blood 

 vessels with which the inner wall 

 of the stomach is covered, and is 

 carried into the blood current by 

 the portal circulation. 



Alcohol is also taken Up by the FlG - 9"- The Internal, or 

 , , , . , . , , ., Long Saphenous, Vein 



lacteals, and is emptied by them of t * e L ; ft Leg 

 into the blood current by way of 



the thoracic duct. Now, although alcohol goes to the heart 

 to be sent to every part of the body in this roundabout way 



