class 9th
Write down the epithelial tissues and its various types
Answers
Epithelial tissue:
Epithelial tissue is also known as epithelium tissue. The epithelial tissue consists single layer of cell. Blood vessels are absent in epithelial tissue. Epithelial tissue is that tissue which cover all our organs like lining of blood vessels, kidney tubules etc. It is also known as covering and protective tissue. This is the tissue which forms a barrier to keep different body system separate. This tissue is tightly packed. This tissue regulate the exchange of material between the body and the external environment.
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This tissue is classified into four subgroups that are mentioned below:
→ Squamous epithelium tissue.
→ Cuboidal epithelium tissue.
→ Columnar epithelium tissue.
→ Stratified squamous epithelial tissue.
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Squamous epithelium tissue:
◕ This tissue is thin and flat.
◕ This tissue forms a delicate lining.
◕ In this tissue cells are arranged to end to end like tiles on the floor.
◕ This tissue form skin covering and covering of tongue.
◕ It also form blood vessels.
◕ The skin which protect our body is made up of this type of tissue.
◕ This tissue is arranged in many layers to prevent wear and tear in the skin.
◕ This you also form lining of cavities, mouth etc.
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Cuboidal epithelium tissue:
◕ This tissue is mentioned in the cube shape.
◕ This tissue found in kidney, salivary gland etc.
◕ This tissue provide mechanical support to us.
◕ This tissue form genetic epithelial like testis and ovaries too!
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Columnar epithelium tissue:
◕ This tissue is like pillar.
◕ It make lining of stomach.
◕ It also form lining of small intestine and large intestine.
◕ It have thread on its surface which help in absorption.
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Stratified squamous epithelial tissue:
◕ This is present in uterine.
◕ It consists squamous epithelial arranged in layers.