Wood is a structural tissue found in the stems and roots of trees and other woody plants. It is an organic material composed mainly of cellulose fibers, which are strong in tension, embedded in lignin that resists compression. Wood serves mechanical support to plants, allowing them to grow large or stand upright, and it also transports water and nutrients. Historically, wood has been used for fuel, construction, tools, furniture, and paper, and currently remains a vital renewable resource. Its composition varies by species but typically includes carbon, oxygen, hydrogen, nitrogen, and minerals. Wood's diverse uses range from building materials to musical instruments and art, highlighting its importance in human civilization.