Changes

: '''Xylem tissue''' supports the [[stem]] of the [[plant]] making it harder to bend under its own [[weight]].

: The '''xylem tissue''' is formed when [[Xylem Cell|xylem cells]] create a [[chemical]] called [[lignin]] which builds up in a spiral shape around the [[Cell Wall|cell wall]]. The [[Xylem Cell|xylem cells]] then die to leave behind hollow tubes supported by the spiral of [[lignin]].