DIAGRAM: GASTROINTESTINAL: GI: ARTERY: Pathogenesis of Atherosclerosis - 8 of 13; A=Lipoproteins, B=Granulocyte, C=Platelet, D=Macrophage, E=Foam Cell -- In the presence of hyperlipidemia, macrophages accumulate lipid and become foam cells. Some foam cells originate from smooth muscle cells that have accumulated lipid b