Wood anatomy is the study of the internal structure of wood, which is primarily composed of three types of cells: tracheids, vessels, and fibers. These cells work together to provide support, transport water and nutrients, and store energy. The arrangement and size of these cells can vary significantly between different species of trees, influencing the wood's strength, density, and appearance. The main components of wood include cellulose, hemicellulose, and lignin. Cellulose provides structural strength, while hemicellulose helps bind the cells together. Lignin adds rigidity and resistance to decay. Understanding wood anatomy is essential for various applications, including construction, furniture making, and papermaking.