secondary cell wall

The secondary cell wall is a layer of tough material formed inside plant cells after the primary wall. It provides additional strength and support, helping the plant stay upright and resistant to external stresses. Composed mainly of cellulose, hemicellulose, and lignin, the secondary wall is thicker and more durable than the primary wall. It is especially important in cells that need to withstand weight or mechanical forces, such as in wood and other structural parts of plants. This specialized layer ensures the plant's stability, water conduction, and structural integrity as it grows and matures.