Scaffolds represent significant components for tissue engineering. Scaffolds are materials that are engineered to cause desirable cellular interactions to contribute to the formation of latest functional tissues for clinical purposes. Cells are the structures capable of supporting three-dimensional tissue formation. The extracellular matrix of the native tissue, recapitulating and allowing cells to influence their own microenvironments. They usually serve at least one of the following purposes: allow cell attachment and migration, deliver and retain cells and biochemical factors, enable diffusion of important cell nutrients and expressed products, exert certain mechanical and biological influences to switch the character of the cell phase.