124 VASCULAR SYSTEM. 



A. He is of opinion, with several experimenters sub- 

 sequent to Bichat, that they do exercise that vital property. 



Q. Is this sensible organic contractility most conspi- 

 cuous in the large or small arteries? 



*#. In the smaller ones, because of the great nervous 

 power distributed to them. 



Q. Why do you think that the arteries aid the flow of 

 blood? 



/?. Because the flow from an artery is constant; if it 

 were dependent on the heart alone, the blood would flow 

 only when the ventricle contracted. 



Q. Why do you suppose the arteries to be self-developed ? 



/?. Because vessels exist before the heart does. 



Q. Which arterial coat is most liable to inflammation ? 



Ji. The internal; in abdominal and thoracic inflamma- 

 tion, the lining membrane of the aorta is found red and 

 inflamed. 



Q. Name the organic alterations of the arteries. 



/?. Inflammation, aneurisms, ossification, cartilaginous 

 transformation. Ossification frequently brings on the gan- 

 grene of old persons. 



PATHOLOGY OF THE VASCULAR SYSTEM WITH RED 

 BLOOD. 



Q. To what diseases are the arteries liable ? 



#. The diseases of the arteries are few. They are in- 

 flammation of the lining membrane, dilatation of the ar- 

 tery without lesion, contractions of the arteries, ossifica- 

 tion, and aneurism. 



