Biomaterials play a vital role in regenerative medicine by serving as scaffolds or frameworks that support the growth and organization of cells into functional tissues and organs. These scaffolds mimic the natural extracellular matrix (ECM) found in the human body, providing structural support and biochemical signals essential for cell attachment, proliferation, and differentiation. Biomaterials can be derived from natural sources, such as collagen, alginate, and chitosan, or synthesized in the lab using materials like polylactic acid (PLA), polyethylene glycol (PEG), or hydrogels. The choice of biomaterial depends on the specific application and the mechanical, biological, and degradation properties required. When used as a scaffold, a biomaterial must be biocompatible and biodegradable, allowing the body to absorb or safely eliminate it over time.