Reviews recent advances in the understanding of solid and liquid biomaterials and of viscoelastic solids and liquids. Includes discussions of the single material characteristic in biological materials of interest for structural uses (wood), and for nutritional uses (gels and gums) and medical purposes (artificial skins and membranes). Twenty-six chapters provide the reader with a perspective on the current state of knowledge of biomaterial science as it affects medical, nutritional, and structural fields of science.