Question

what are permanent tissues? describe different types of permanent tissues.​

Answer 1

Answer:

Permanent tissue are those type of tissue who have lost their power of division...............

THERE ARE TWO TYPE OF PERMANENT TISSUE

COMPLEX PERMANENT TISSUE

SIMPLE PERMANENT TISSUE..........

Answer 2

Permanent Tissue:

• Permanent tissues are composed of cells that have lost the power of cell division.
• They have definite shape and size.
• Under special circumstances they regain their cell division power.

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Types of Permanent Tissue:

1. Simple permanent Tissue
2. Complex permanent tissue.

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a. Parenchyma:

• They're living tissue.
• They're universal in distribution in plant body.
• It's a part of ground tissue.
• Its found in mesophyll of leaves and endosperm of seeds.
• They're of three types----

1. Chlorenchyma: They have chloroplasts in them.
2. Aerenchyma: They have oval cells with lot of intracellular spaces containing air
3. Storage Parenchyma: They store sugars, protein granules.

b. Collenchyma:

• The cells are elongated
• The end of the cells are blunt.
• The cell wall is made up of cellulose
• Cells may not contain intracellular spaces.
• Nucleus is prominent
• Primary pits are present where walls are uniform in thickness.

c.Sclerenchyma:

• The cells are cpmpactly arranged
• The cells are dead
• The cells don't have chloroplasts.
• Cells have lignin on their secondary walls

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a. Xylem:

• This tissue conducts water
• They also conduct minerals
• Conduction is unidirectional
• It also gives mechanical strength to the plant organ containing it

b. Phloem:

• They conduct food
• Phloem is involved in translocation in both directions.