histology of the aorta revealed significant increases in collagen content ( microgram/mg dry wt ) from proximal to distal aortic segments ( 27 +/- 2 vs. 38 +/- 6 ; p less than 0.005 ) in hypertensive animals but not in controls ( 27 +/- 2 vs. 32 +/- 6 ; ns ) .
C0003483
aorta
C0506947
aortic segments