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A) A normal control rat aorta. B) An ovariectomized control rat aorta. C) The aorta of a rat fed with fresh soy oil. D) The aorta of a rat fed with once-heated soy oil. E) The aorta of a rat fed with five-times-heated soy oil. Note the collagen fibrils (c) in the subendothelial layer (in B) and vacuolization (v) of the endothelial cells (in D and E). L, lumen; TI, tunica intima; IEL, internal elastic lamina; TM, tunica media; EC, endothelial cell (7,700x)
