Biocompatibility refers to the ability of a material to interact safely with biological systems without causing an adverse reaction. This property is crucial for materials used in medical devices, implants, and prosthetics, as they must integrate well with body tissues and fluids. Testing for biocompatibility involves assessing how materials respond to cells, tissues, and the immune system. Commonly evaluated materials include metals, polymers, and ceramics, which are often used in products like stents, artificial joints, and sutures. Ensuring biocompatibility helps improve patient safety and the effectiveness of medical treatments.