| − | A '''cell wall''' is a structure formed of [[cellulose]] that surrounds plant cells. Cell walls typically have transport [[protein]]s that pass through to allow movement between adjacent [[cell]]s. | + | A '''cell wall''' is a structure formed of [[cellulose]] that surrounds plant cells. Cell walls typically have transport [[protein]]s that pass through to allow movement between adjacent [[cell]]s. These pores are known as tight junctions, and are also important in holding cells together in tissues. |