Silk is a natural protein fiber formed by the secretion of fluid by certain arthropods, subsequently solidified into filamentous strands. Chemically, it is a fibroin protein, comprising repeating amino acid units that give the material exceptional tensile strength, elasticity, and luster. Historically, the processed fiber has been highly valued for its use in luxurious textiles, ranging from clothing to decorative arts. In modern science, purified silk proteins are utilized in advanced biomaterials, including wound dressings, scaffolds for tissue engineering, and drug delivery systems, owing to the protein's biocompatibility and ability to degrade safely within biological systems.