6. Tissues-Animal Tissue Science Class 9 In English-CBSE Notes
Explore science cbse notes for Class 9 Chapter 6. Tissues Topic Animal Tissue in English medium for exams preparation.
6. Tissues-Animal Tissue Science Class 9 In English-CBSE Notes
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All Topics Chapter 6. Tissues
- 1. Meristematic And Simple Permanent Tissue
- 2. Complex permanent Tissue
- 3. Epidermis
- 4. Animal Tissue
- 5. Connective Tissue
- 6. Muscular Tissues
- 7. Nervous Tissue
Notes
6. Tissues-Animal Tissue Science Class 9 In English-CBSE Notes
6. Tissues
Animal Tissue
Animal Tissue:
The tissues are formed by groups of animal cells are called animal tissue.
1. Epithelial Tissue:
The covering or protective tissues in the animal body are epithelial tissues.
Functions of Epithelial Tissue:
(i) Epithelium covers most organs and cavities within the body.
(ii) It also forms a barrier to keep different body systems separate.
(iii) The permeability of the cells of various epithelia play an important role in regulating the exchange of materials between the body and the external environment.
Properties of Epithelial Tissue:
(i) The skin, the lining of the mouth, the lining of blood vessels, lung alveoli and kidney tubules are all made of epithelial tissue.
(ii) Epithelial tissue cells are tightly packed and form a continuous sheet.
(iii) They have only a small amount of cementing material between them and almost no intercellular spaces.
(iv) Anything entering or leaving the body must cross at least one layer of epithelium.
(v) All epithelium is usually separated from the underlying tissue by an extracellular fibrous basement membrane.
Types of Epithelial Tissue:
(1) Simple Squamous Epithelium : in cells lining blood vessels or lung alveoli, where transportation of substances occurs through a selectively permeable surface, there is a simple flat kind of epithelium. This is called the simple squamous epithelium.
Properties:
(i) Simple squamous epithelial cells are extremely thin and flat and form a delicate lining.
(ii) The oesophagus and the lining of the mouth are also covered with squamous epithelium.
(iii) The skin, which protects the body, is also made of squamous epithelium.
(2) Stratified Squamous Epithelium : Skin epithelial cells are arranged in many layers to prevent wear and tear. Since they are arranged in a pattern of layers, the epithelium is called stratified squamous epithelium.
(3) Columnar Epithelium : Where absorption and secretion occur, as
in the inner lining of the intestine, tall epithelial cells are present. This is called columnar epithelium.
Properties:
These are found in the respiratory tract, the columnar epithelial tissue also has cilia, which are hair-like projections on the outer surfaces of epithelial cells.
Functions:
(i) These cilia can move, and their movement pushes the mucus forward to clear
it. This type of epithelium is thus ciliated columnar epithelium.
(4) Cuboidal Epithelium: This types of epithlium is cuboidal shape and these Cuboidal epithelium (with cube-shaped cells) forms the lining of kidney tubules and ducts of salivary glands.
Sometimes a portion of the epithelial tissue folds inward, and a multicellular gland is formed. This is glandular epithelium.
Functions:
(i) It provides mechanical support. Epithelial cells often acquire additional specialisation as gland cells, which can secrete substances at the epithelial surface.
All Topics Chapter 6. Tissues
6. Tissues-Animal Tissue Science Class 9 In English-CBSE Notes
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CBSE Notes for Class 9 science Chapter 6. Tissues – Animal Tissue
The CBSE Notes for Class 9 science Chapter 6. Tissues – Animal Tissue are prepared to help students understand every concept in a simple, clear, and well-organized manner. These notes are based on the latest CBSE syllabus and are suitable for regular classroom learning, homework, revision, and examination preparation. Every topic is explained using easy language so that students can learn important concepts without difficulty and develop a strong academic foundation.
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Success in examinations depends on consistent practice and smart revision. These CBSE Notes for Class 9 science Chapter 6. Tissues – Animal Tissue are designed to reduce study pressure by presenting important information in a concise and meaningful way. Students can use them throughout the academic session for daily learning as well as last-minute revision before examinations.
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6. Tissues-Animal Tissue Science Class 9 In English-CBSE Notes Study Materials For Class 6 to 12
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