Xylem tissue is made up of 4 kinds of cells. They are :
1. Tracheids
2. Vessels
3. Xylem parenchyma
4. Xylem fibres

Xylem is composed of following elements:
`rarr` Tracheids
`rarr` Vessels
`rarr` Xylem parenchyma
`rarr` Xylem fibres

Tracheids and vessels, xylem parenchyma and xylem fibre all these make up the xylem tissue.

The following four types of elements make up xylem tissue:

(i) Xylem tracheids (tubular unicellular).

(ii) Xylem vessels (multicellular).

(iii) Xylem parenchyma (stores food and helps in sideways conduction of water).

(iv) Xylem fibres (provide mechanical support).