THE CIRCULATION OF THE BLOOD 



Place the syringe flat, without kinks or bends, on a desk or table. 

 Press the bulb slowly and regularly. The water is thus pumped into 

 the tube in an intermittent manner, and yet it is forced out of the 

 tapering end of the glass tube in a steady flow. 



FIG. 93. William Harvey demonstrating the Circulation of Blood to 

 King Charles the First of England. 1 



210. The Portal Circulation. The blood which is brought 

 to the capillaries of the stomach, intestines, spleen, and pan- 

 creas takes a roundabout course to get back to the heart. 



1 William Harvey was a famous English physician who discovered the 

 circulation of the blood, nearly three hundred years ago. This fine picture 

 represents the king as witnessing the dissection of a doe, of which he had 

 placed many at Harvey's disposal while the great physician was making 

 his investigations concerning the circulation of the blood. 



The picture is used by the kind permission of William Wood & Co., 

 publishers. 



