Question

why are xylem and phloem called complex tissues?

Answer 1

Hello dear!!

Xylem and phloem are known as complex tissues as they are made up of more than one type of cells. These cells work in coordinated manner , as a unit , to perform the various functionsof xylem and phloem.

Hope it helps..!!

Answer 2

the xylem and phloem called complex tissuse as there made up of more than one type of cells. THIS CELLS WORK IN A  COORDINATED MANNER,AS A UNIT, TO PERFORM THE VARIOUS FUNCTIONS OF THE XYLEM AND PHLOEM . TRACHEIDS ARE ELONDGATED,THICK WALLED DEAD CELLS WITH TAPERING ENDS.
                              AND ABOUT XYLEM HELPS IN CONDUCTING WATER AND MINERALS. IT PROVIDES MECHANICAL SUPPORT TO PLANTS. IT MADE UP OF FOLLOWING COMPONENTS:
* TRACHEIDS
*XYLEM PARENCHYAM
*XYLEM FIBRES
                   AND ABOUT PHLOEM IS ALSO CALLED BAST, TISSUSE IN THE PHANT THAT CONDUCT THE FOOD MADE IN THE LEAVES TO ALL OTHER PARTS OF THE PHANT . PHLOEM COMPOSED OF VARIOUS SPECIALIZED CELLS CALLED :
*SIEVE TUBE ELEMENT
*COMPANION CELLS
*PHOLEM PARENCHYAM
*PHLOEM FIBRES
                                      THIS IS REASON THE XYLEM AND PHLOEM CALLED COMPLEX TISSUES