What causes athersclerosis?
If the wall of an artery is injured low density lipoproteins (LDL) add chloesterol to the cells under the endothelial lining of the artery. Phagocytic cells then move under the lining to tremove the cholesterol. However, these phagocytic cells turn into foam cells which accumulate. Next fibroplast builds up within the artery wall. This fibrous material gradually hardens due to a build up of calcium eading to the formatio of a hard plaque under the endothelial lining.