Question

what is xylem ? name the four element of xylem and write one function of each

Answer 1

xylem is a Complex permanent tissue which conducts water and mineral salt upward from Roots to leaves.

the four elements of xylem are
tracheids
vessels
xylem parenchyma
xylem fibres

trachieds - they transport water and Minerals vertically

vessels - they also transport water and mineral vertically

xylem parenchyma - Stores food and helps in sideway conduction of water

xylem fibres - they are mostly supportive in functions

hope it helps you

Answer 2

Xylem is the complex permanent tissue which helps in the conduction of water and minerals from stems to roots and to give mechanical strength to the plant parts.
Xylem has four different types of cells :
Tracheids, Vessels, Xylem fibres, Xylem parenchyma

Functions

1) Tracheids

They are the primitive conducting elements of xylem

2) Vessels

They are advanced conducting elements of xylem
They work as a pipeline during conduction of water

In flowering plants, tracheids and vessels are main water transporting elements.

3) Xylem fibres

They provide strength to tracheids and vessels. They are abundantly found in secondary xylem (wood).

These all three cells are dead (without protoplasm)

4) Xylem parenchyma

Storage of food material in the form of starch or fat and storage of other substances like tannins.
A special xylem parenchymatous cells known as xylem rays helps in radial conduction of water.
Xylem parenchyma cells are living