Biomedical engineers apply the concepts of engineering - mathematical modeling, analysis, design—to living systems, improving lives by solving problems in biology and medicine. The field is rapidly expanding to include many exciting research areas: Bioinstrumentation (developing tools for biological research) Biomaterials (creating synthetic materials intended to interact with living systems) Biomechanics (analyzing the mechanics of living organisms) Cell and tissue engineering (repairing or replacing living cells with synthetic ones) Drug delivery (improving the way medications are administered) Medical imaging (creating images of the body using light, sound, radiation, electrodes, etc.)