Biology, asked by KalashGiri, 1 year ago

What are plant tissues explain the types of plant tissue also ?

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Answered by Anonymous
29
Hey mate!!!

Here's your answer!!


PLANT TISSUES:
Plant tissues are the tissues present in the plants. They are of two types. They are:


Meristematic Tissues
They are capable of division. They help in the growth of the plant. They are of three types:

a. Apical Meristem: Increase the length of the plant. They are present on the root tips of the plants.

b. Lateral Meristem: Increase the girth of the plant. They are present vertically in the stem of the plant.

c. Intercalary Meristem: Increase the height of the plant. They are present horizontally in the stem of the plant.


Permanent Tissues
They aren't capable of division. They thus help in protecting the plant. They are of two types:

a. Simple Permanent Tissues
They are made up of single type of cells. They are of three major types:

Parencyma: Have large intercellular space. They are live cells. They help in packaging.

Collencyma: They have comparitively less intercellular space. They are also live cells. They provide the plant with flexibility.

Sclerencyma: They have no intercellular space. They are dead cells. They protect the plant.

b. Complex Permanent Tissues
They are made up of different types of cells. They are of two major types:

Xylem: Help in transporting water and minerals in plants. Consists of tracheids, vessels, xylem parenchyma and xylem fibres. The cells have thick walls, and many of them are dead cells.
Tracheids and vessels are tubular structures. This allows them to transport water and minerals vertically. The parenchyma stores food and helps in the sideways conduction of water. Fibres are mainly supportive in function.

Phloem: Made up of four types of elements: sieve tubes, companion cells, phloem fibres and the phloem parenchyma. Sieve tubes are tubular cells with perforated walls. Phloem is unlike xylem in that materials can move in both directions in it. Phloem transports food from leaves to other Parts of the plant. Except for phloem fibres, phloem cells are living cells.

Xylem and Phloem together constitute the vascular bundle.

Refer to the pic also.

Hope it helps!!
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Answered by Anonymous
10
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Plant Tissue➫ A collection of similar cells performing an organized function for the plant.

➧ Categories of Plant Tissues are:-
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❶❭ Meristematic Tissues:-
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◉ Cells are small, undifferentiated & thin-walled.

◉ These are compactly arranged without intercellular spaces.

◉ Cytoplasm is dense vacoules are small or absent.

◉ Nucleus is prominent & centrally located.

◉ The cell divide repeatedly throughout the life of a plant adding to its size.

Simple Permanent Tissues➫ Tissue which is made up of similar permanent cells that carry out the same function.

➧ Types 0f Simple Permanent Tissues are:-
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❶❭ Parenchyma:-┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● The unspecialised living plant tissue formed of thin walled rounded cell.

● This cell are isodiametric & least specialised.

● It is considered at the fundamental tissue or ground tissue.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ Cells are living cells with thin cell wall of cellulose.

❱ They are rounded, oval or polygonal in shape with intercellular spaces.

❱ Cytoplasm is dense with one large or more than one small vehicles.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It form the ground tissue or packing tissue in plants.

❱ It provide rigidity to the plant by keeping cell rigid.

❱ It's cell store food.

❱ It helps in wound healing, regeneration & grafting.

❱ It cells are allow to exchange of respiratory gases.

❷❭ Collenchyma:- ┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● It is found in steam leaf, leaf stalk & leave midribs of dicot herbaceous plant.

● It forms a layer below the epidermis called hypodermis.

● It is absent in monocot stem.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ Cells are living unfairly elongated.

❱ They appear polygonal, 0val or circular in cross-section.

❱ Cells surrounded by thik primary cell wall alone.

❱ The cell wall is thickened along the corner due to the deposition of cellulose & pectin.

❱ The cytoplasm has a large central vacuole.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It provide mechanical support to the delicate developing organs of herbaceous Dicot stem.

❱ It cells combine both tensile strength & flexibility.

❱ It cells with chloroplast carrying out photosynthesis.

❱ This cell also store food & allow growth & elongation of 0rgan.

❸❭ Scelerenchyma :- ┅┅┉┅┅┉┅┅┉┅┅┉┅┅┉┅☟

● It is a hard supporting tissue formed of long, narrow & pointed ends.

● It occurs in root stem, leaves & petiole.

● These cells are dead with thick lignified walls that gradually lose Protoplasm.

➧ It's Characteristics are:-━━━━━━━━━━━━━━━━━━☟

❱ These are dead cell without nucleus & cytoplasm.

❱ Their cell wall is formed of cellulose & hemi-cellulose.

❱ It is thickened due to the secondary the position of Lignin.

❱ Lignin act as a cement & hardens the cell wall.

❱ The lignified cell wall has pits.

➧ It's Functions are:-━━━━━━━━━━━━━━━━━━☟

❱ It provide most of the support in a plant.

❱ To compressive & tensile stresses in plants.

❱ It allows the organs to withstand bending, shearing & compression.

❱ It's cells provide protective, vascular & supportive functions.

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Thanks...✊
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