Question

What is complex permanent tissue ? give 2 examples ..

Answer 1

These tissues are characterised by the presence of dissimilar cells. Hence, they are described as heterogenous in their cellular composition.
The complex permanent tissues are also known as vascular tissues or conducting tissues, since they are involved in the movement of various chemical substances in the plant body. This movement is known as translocation. It is of two types namely.
Sub Topics
Inorganic Translocation
Organic Translocation

Answer 2

Complex permanent tissues are conducting tissues, which take part in the transport function of plants. They are of two types– xylem (which transports water), and phloem (which transports food materials). The presence of this vascular tissue is an important feature of all complex terrestrial plants.

Xylem comprises of the following:

Xylem vessels and tracheids are tubular structures, which allow vertical transport of water and minerals.Vessel cells are continuous, while tracheids are discontinuous. They are both conductive tissues.Xylem parenchyma stores food and conducts water sideways.Xylem fibres are supportive in function.

Phloem comprises of the following:

Sieve tubes are tubular cells with perforated walls.Companion cells are elongated cells, which are always associated with sieve tubes. They perform metabolic functions and helps in water translocation.Phloem parenchyma is a cell associated with the phloem tissue. They pack other types of cells together.Phloem fibres are non-living cells.

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