Sclerenchyma cells have secondary wall layers that are constructed from cellulose microfibrils in a matrix of hemicelluloses and lignin. The cell geometry and the orientation of the cellulose are tailored to provide diverse combinations of strength, flexibility and stiffness in plant organs subjected to different loads by gravity, wind and weather.
Lignin is a class of complex organic polymers that form important structural materials in the support tissues of vascular plants and some algae.