Biomedical engineering is the application of engineering principles and design concepts to medicine and biology. It seeks to close the gap between engineering and medicine by designing products and procedures that solve medical problems, such as artificial organs, prostheses, medical instrumentation, and health systems. Biomedical engineers work with doctors and scientists to develop and apply technology including designing equipment to analyze blood samples, creating artificial hearts and skin grafts, and developing prosthetic hips and devices to repair bones.