REGULATION OF THE FLOW OF BLOOD l8/ 



321. How to stop a bleeding. It should be remembered 

 that sufficient pressure will instantly stop any bleeding. 

 If a hand is placed on each 



side of the cut, so as to 

 hold its edges firmly to- 

 gether, no bleeding can *> 

 occur. A second way of 

 stopping bleeding is by 

 pressing a handkerchief, 

 or a finger, or even the 

 whole hand, into the Natural stoppage of bleeding. 



wound. A third way in ? w^ ed f of . a cut - 



b blood tube, showing its contracted cut 



which bleeding may be end filled with a clot, 

 stopped is by cutting off e bloodclot - 



the supply of blood to the part. This may be done by 

 tying a handkerchief very tightly around the limb be- 

 tween the wound and the heart. The knot in the hand- 

 kerchief should lie over the artery, and, if necessary, a 

 stick may be inserted under the band and twisted tightly. 

 Of these three ways of stopping bleeding, that of compres- 

 sion by the hands is the best to use at first. 



322. Position of arteries. Main arteries run in a general 

 direction down the middle of each limb, upon the side on which the 

 limb can be bent. Thus in the upper part of the arm, the artery run? 

 across the center of the armpit, and then down the inner side of the 

 upper arm. At the elbow it lies in the center of the front side of the 

 arm. An artery lies upon the thumb side, and another upon the little 

 finger side of the front of the wrist. 



In the leg the main artery lies in the middle of its upper part, and 

 reappears at the surface in the middle of the bend of the knee. At the 

 ankle it is divided into two, one of which is just behind the inner ankle 

 bone, and the other runs down the middle of the front of the foot. 



There is a large artery and a large vein in the middle of each side 

 of the neck. These positions should be remembered, for they are the 

 principal places in which a large blood tube is likely to be wounded, 



