Context: Wood is a heterogeneous, hygroscopic, cellular and anisotropic material. It consists of cells, and the cell walls are composed of micro-fibrils of cellulose (40% – 50%) and hemicellulose (15% – 25%) impregnated with lignin (15% – 30%).

Question: Along with hygroscopic, cellular, and anisotropic, how is the material of wood described?
Answer: heterogeneous

Question: What does wood consist of?
Answer: cells

Question: What part of wood's cells are composed of cellulose and hemicellulose?
Answer: walls

Question: What makes up 40-50% of the cell walls in wood?
Answer: cellulose

Question: What substance is hemicellulose impregnated with?
Answer: lignin