Protective Tissue - Tissue | Class 9 Biology Chapter 6 | 2023-24

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✅ In this video,

✔️ Class: 9th
✔️ Subject: Biology
✔️ Chapter: Tissue
✔️ Topic Name: Protective Tissue

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00:00 Introduction: Protective Tissue
00:39 Types of Tissue: Protective Tissue
01:58 Types of Protective Tissue: Epidermis
16:58 Types of Protective Tissue : Cork
18:41 Website Overview
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Points covered in this video:-
Structure:
Made of single layer of cells
Cells are elongated, flat
No intercellular spaces
Occurrence:
Outermost layer of all the plant parts
E.g. Leaves, flowers, stem and roots.
Functions:
Protects all parts of plants
Plants of dry habitats have thicker epidermis
Prevents water loss
Epidermal cells on the aerial parts of plants secrete waxy secretions
Waxy secretions
Plants growing in desert have cuticle
Layer of cutin is called cuticle
Cutin is waxy materials and water resistant
Functions:
Cuticle aids in protection against water loss, injury and invasion by fungi
Epidermal cells of the roots forms hair like structure
Long hair like parts increase absorption surface area of roots
In leaves, Epidermal cells form Stomata
Stomata are guarded by guard cells
Guard cells are Kidney shaped
Guard cells regulate gaseous exchange .

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