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Arteriosclerosis & Atherosclerosis == Arteriosclerosis & Atherosclerosis are often interchanged but are different. * Arteriosclerosis is the thickening, hardening and loss of elasticity of the walls of arteries . Unlike atherosclerosis, arteriosclerosis is a sclerosis that only affects small arteries and arterioles , which carry important nutrients and blood to the body’s organs.This process gr...