Complex tissues are made up of more than one type of cells. All these cells co-ordinate to perform common function.

These are : xylem and phloem.

Both are conducting tissues and form a vascular bundle.

Xylem consists of- tracheids, vessels, xylem parenchyma and xylem fibres. Most of these cells are dead. Tracheids and vessels helps in water transportation, parenchyma stores food and helps in the sideways conduction of water and fibres are mainly supportive in function.

Phloem is made up of four types of elements- sieve tubes, companion cells, phloem fibres and phloem parenchyma. It helps in the transportation of food in both the directions, i.e. from leaves to roots and to other parts of the plant.