Answer the questions.[Bio-5M]

Question

What do you know about complex tissue Classify and explain its different types in plants with suitable diagrams.

Vidyadip · Accepted Answer

Xylem: Xylem is a vascular and mechanical tissue which conducts water. Xylem is composed of cells of four different types:

Phloem: Phloem is also a vascular tissue which transports food from the leaves to the various parts of the plant. It is composed of:

Sieve tubes: Sieve tubes are slender, tube-like structures composed of elongated thin-walled cells, placed end to end. Their end walls are perforated by numerous pores and are called sieve plates.
Companion Cells: It is a small thin-walled cell containing dense and very active cytoplasm and large elongated nucleus.
Phloem parenchyma: These are thin-walled, living cells of parenchyma of phloem. They have two functions, storage and slow lateral conduction of food.
Phloem Fibres: These are thick-walled, elongated spindled shaped dead cells which posses narrow lumen. They provide mechanical strength to the tissue.

Answer