Chitin

Chitin is the substance that makes up the outer shell of insects, and is also found in the cell wall of fungi [1]

It is a chemical that provides both toughness and flexibility.[2]

## References[edit]

1. ↑ Morphology of the fungi
2. ↑ Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998