Cellulose is the main chemical component of plant cells. Cellulose is formed from β-D glucose with six carbons. A cellulose chain is formed by 1000-3000 molecules of cellulose. A mycelium is formed by 100 cellulose chains. Each mycelium is 10 nm in diameter. A microfibril is formed by 20 mycelia. The diameter of the microfibrils is 250 angstroms. Again, 250 microfibrils join together to form a macrofibril. Its diameter is 0.4 micron. Each macrofibril contains 500,000 molecules of cellulose. It is the main structural unit of the cell wall. It creates a web-like texture. Between the macrofibrils are microcapillaries. Many macrofibrils join together to form fibers. Fibers are clearly visible in the cell wall.