Why xylem and phloem are known as complex permanent tissue

1.	Why xylem and phloem are known as complex permanent tissue
Answer» Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in a coordinated manner, as a unit, to perform the various functions of the xylem and phloem. Tracheids are elongated, thick-walled dead cells with tapering ends.

Discussion