Hemicellulose is a complex carbohydrate found in the cell walls of plants, working alongside cellulose to provide structural support. Unlike cellulose, which is made up of long chains of glucose, hemicellulose consists of shorter, branched chains of various sugars, including xylose and mannose. This diversity allows hemicellulose to fill the spaces between cellulose fibers, making plant cell walls more flexible and resilient. In addition to its structural role, hemicellulose is important for the digestion of plant materials by animals, including humans. It can be broken down by certain enzymes, contributing to dietary fiber. This makes hemicellulose a valuable component in foods like whole grains and fruits, promoting gut health and aiding digestion.