What is a complex tissue? Write the structure of any one complex tissue.

Complex tissue:

• It is a type of tissue that is formed of multiple types of cells instead of only one type.
• These multiple type of cells are dedicated to only one role as a whole system.
• In plants, there are two such complex tissues; the xylem and phloem, which are together known as the vascular system.

Xylem;

• It is the main water conducting system in plants.
• It is prevalent in all parts and organs of the plant and acts as a water supplying system.
• It takes up water from the roots and distributes it all over the plant corners.
• The xylem is made up of four types of cells;

1. Xylem tracheids:

• It is made up of dead and empty cells.
• These cells are narrow and long with tapering ends.
• They provide the xylem with mechanical strength.

2. Xylem vessels;

• They are long tubes formed by the joining of multiple cells end to end.
• They act as water supplying pipes.

3. Xylem parenchyma:

• It is composed of live parenchyma cells.
• It stores starch, oil and some waste substances.

4. Xylem fibers:

• It is made up of sclerenchyma cells.
• It adds to the mechanical strength of the plants.

Phloem :

• It acts as the main food transporting system.
• It trans locates food from leaves to all the other cells and tissues of the plant.
• It works in multiple directions.