The majority of cells populating subendothelual intima is represented by smooth musle cells and pericyte-positive cells. Hematogenic cells and monocyte-macrophages represent small part of intimal cells in normal aorta. However, in atherosclerotic lesions the portion of these cells is increased significantly but they remain the minority. It is interesting that pericyte-positive cells have different state in normal intima and in atherosclerotic lesion. In normal intima we have found only non-activated pericyte-positive cells but in atrherosclerotic plaque the most part of pericyte-positive cells are proliferating pericytes. In total in atheroslerotic plaque pericyte-positive cells and smooth muscle cells compose the majority as in normal intima. The propostion of smooth muscle cells does not chage significantly in atherosclerotic lesions.