Bioengineering (also encompases biomeical engineering and medical engineering) is an application of engineering principles and design to challenges in human health and medicine. Bioengineering is related to Biological Engineering, the latter including applications of engineering principles to the full spectrum of living systems, from microbes and plants to ecosystems. Bioengineering exploits new developments in molecular biology, biochemistry, microbiology, and neuroscience as well as sensing, electronics, and imaging, and applies them to the design of medical devices, diagnostic equipment, biocompatible materials, and other important medical needs. Bioengineering couples engineering expertise with knowledge in biological sciences such as genetics, molecular biology, protein chemistry, cytology, neurobiology, immunology, physiology, and pharmacology. Bioengineers work closely with, but are not limited to, medical doctors and other health professionals to develop technical solutions to current and emerging health concerns.