BLOOD-VESSELS OF THE HKAiri^ VALVES 



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Nearly all of those vessels in the chordae lie just beneath the 

 endothelium. Some, however, are situated in the center of the 

 chordae. 



The chordae tendineae of the pigs heart have an abundant sup- 

 ply of blood vessels. As these have not been previously described, 

 they are shown here in the following photographs (figs. 5 and 6). 



Fig. 4 Photograph of the blood-vessels in the chordae tendineae of the 

 pig's heart, after injection with carniin gelatin. In the human heart, only 

 rudiments of this al)undant vascularity are demonstrable. 



Semilunar valves 

 The blood-vessels of the aortic and pulmonary valves arise 

 from two sources, one of which is the ^'asa vasorum of the ar- 

 teries, the other the vessels of the auricular endocardium. In- 



