Biomaterials are engineered to interact with living tissues and biological systems to support, repair, or replace damaged bodily functions. This interdisciplinary field blends materials science, biology, chemistry, and medicine to develop materials that are biocompatible, biodegradable, and functional in clinical settings. Applications include bone and dental implants, drug delivery systems, tissue scaffolds, and diagnostic tools. Research focuses on understanding how materials behave in the body and designing smart materials that respond to physiological cues.