VASCULAR SYSTEM. 125 



Q. Can you give a remarkable fact illustrating the in- 

 disposition of the arteries to disease? 



#. This is one; that they are so constantly found unin- 

 jured while all the surrounding parts are destroyed. 



Q. What appearances during life and after death indi- 

 cate inflammation of the lining membrane of the arteries? 

 *ft. There are no conclusive symptoms during life; and 

 after death the membrane is of a high red colour, some- 

 what thickened, and is said to be more brittle. 



Q. Where do you see dilatation of the arteries without 

 lesion ? 



#. It has been seen general and partial ; the coats thick- 

 en in proportion to the increase of the size of the artery. 



Q. What do you remark of the contraction of the arteries? 



t#. It is also general or partial. The first arises when 

 the vital forces, general and arterial, are much diminish- 

 ed; the partial is seen in the large arterial trunks. 



Q. What coat is most liable to ossification? 



#. The internal membrane. 



Q. At what age does this ossification occur? 



A. Principally in the aged. 



Q. How does it affect the pulse? 



#. It renders it intermitting and irregular. 



Q. Where is aneurism oftenest seen ? 



/2. About the curvature of the aorta ; next to that in the 

 abdominal aorta. 



Q. What is a true aneurism ? 



fl. An arterial dilatation, where the external coat is un- 

 ruptured, although the middle and internal may be burst. 



Q. Define a false aneurism. 



#. It is a collection of blood in the surrounding cellu- 

 lar texture from rupture of the arterial coats. 



