[Solved] In theory, how does the use of health maintenance organizations (HMOs) help to control health-care costs? Broad Openings: Structures or objects having a wide gap or aperture. Atherosclerotic Plaques: Accumulations of fatty deposits and other substances in the arterial walls, leading to reduced blood flow and the risk of cardiovascular diseases. Cardiac Catheterization: A medical procedure used to diagnose and treat some heart conditions, involving the insertion of a catheter into a heart chamber or vessel. Occluding: The act of blocking or closing off a passage or vessel in the body, often referred to in medical and health contexts.