1 HISTORICAL REVIEW OF THE DEVELOPMENT OF NATURAL POLYMERS<br> <br>2 POLYSACCHARIDES FOR BIOMEDICAL APPLICATION<br>2.1 Sources, Structures and Properties of Alginate<br>2.2 Sources, Structures and Properties of Cellulose<br>2.3 Sources, Structures and Properties of Hyaluronic Acid<br>2.4 Sources, Structures and Properties of Chitosan<br>2.5 Sources, Structures and Properties of Other Polysaccharides<br>2.6 Summary<br> <br>3 POLYPEPTIDES FOR BIOMEDICAL APPLICATION<br>3.1 Sources, Structures and Properties of Collagen<br>3.2 Sources, Structures and Properties of Gelatin<br>3.3 Sources, Structures and Properties of Silk Fibroin<br>3.4 Sources, Structures and Properties of Other Polypeptides<br>3.5 Summary<br> <br>4 OTHER KINDS OF NATURAL POLYMERS FOR BIOMEDICAL APPLICATION<br>4.1 Sources, Structures and Properties of Catechins<br>4.2 Sources, Structures and Properties of Quercetin<br>4.3 Sources, Structures and Properties of Resveratrol<br>4.4 Sources, Structures and Properties of Curcumin<br>4.5 Summary<br> <br>5 CONCLUSION AND OUTLOOK<br> <br>