normal and cholesterol-blocked artery. blood clot, thrombus, atherosclerotic plaque. deep vein thrombosis dvt or

blood vessel plaque normal thrombosis cholesterol artery vein vascular block dvt swelling disease vector anatomy clot leg thrombus valve pain flow red atherosclerosis blocked care health venous varicose inside medical foot symptoms treatment medicine therapy coagulation bloodstream clinic senior edema cell drug circulation arteriosclerosis illustration healthy structure platelet erythrocyte