What is the biologic structure of the coconut shell?

The coconut shell, or exocarp, is primarily composed of a hard, fibrous material known as lignocellulose, which consists of cellulose, hemicellulose, and lignin. This structure provides strength and durability, protecting the seed inside. The shell’s outer layer is smooth and brown, while the inner layer is often more fibrous and harder, contributing to its overall resilience. Additionally, the shell has small pores that can allow for gas exchange.