Chitin is a natural polymer that forms a key structural component in the exoskeletons of insects and crustaceans, such as crabs and lobsters. It provides strength and protection, allowing these creatures to thrive in various environments. Chitin is also found in the cell walls of fungi, contributing to their structure and resilience. In addition to its biological roles, chitin has practical applications in various fields. It can be processed into chitosan, which is used in medical and agricultural products. Chitin's biodegradable nature makes it an eco-friendly alternative in materials science, promoting sustainability in various industries.