264 



PHYSIOLOGY. 



the arteries. The reason is, that as these convey the blood 

 from the heart, the patient would soon bleed to death unless 

 some means were adopted to prevent it. But, although the 

 veins are as large as the arteries, yet, as they carry the 

 blood back to the heart, they do not bleed, although they are 

 not tied. 



Fig. 5. 



The Venous System. 



