Which is the simplest protective tissue present in animal body state two functions?
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EPITHELIAL TISSUE
The covering and protective tissues in the animal body are epithelial tissues. It covers most organs and cavities within the body and forms a barrier to keep different body systems separate.
Example: Skin, Lining of the mouth, lining of blood vessels, lung alveoli and kidney tubules
Characteristics of epithelial tissue:
· Tightly packed and form a continuous sheet.
· Small amount of cementing material is present between them and almost no intercellular spaces.
· It plays an important role in regulating the exchange of materials between the body and the external environment and also between different parts of the body.
· Matrix is either absent or negligible
· Number of cells are large
Depending on the structures that correlate with their unique functions, epithelial tissues are classified into Simple and stratified epithelium.
Simple Epithelium: Cells are arranged in a single layer and does not contain matrix.
· Squamous: Thin and flat tissue and forms a delicate lining. They are arranged closely and jointed by cement material. Example: Lining of blood vessels, heart and lymphatic tubes
· Columnar: Cells are broad and nucleus is oval in shape and is locatd in the centre or towards the narrow end
Example: innerlining of alimentary canal, cystic duct
· Cuboidal: Cube shaped cells and provides mechanical support and helps in secretion and absorption.
Example: Kidney tubules
· Glandular: Tissue folds inward and forms multicellular gland and secretes substances at the epithelial surface.
Stratified Epithelium: Cells are arranged in a many layers and are capable of cell division. Regions which are exposed to greater wear and tear such as epidermis of skin and lining of rectum are made up of stratified epithelium.
The covering and protective tissues in the animal body are epithelial tissues. It covers most organs and cavities within the body and forms a barrier to keep different body systems separate.
Example: Skin, Lining of the mouth, lining of blood vessels, lung alveoli and kidney tubules
Characteristics of epithelial tissue:
· Tightly packed and form a continuous sheet.
· Small amount of cementing material is present between them and almost no intercellular spaces.
· It plays an important role in regulating the exchange of materials between the body and the external environment and also between different parts of the body.
· Matrix is either absent or negligible
· Number of cells are large
Depending on the structures that correlate with their unique functions, epithelial tissues are classified into Simple and stratified epithelium.
Simple Epithelium: Cells are arranged in a single layer and does not contain matrix.
· Squamous: Thin and flat tissue and forms a delicate lining. They are arranged closely and jointed by cement material. Example: Lining of blood vessels, heart and lymphatic tubes
· Columnar: Cells are broad and nucleus is oval in shape and is locatd in the centre or towards the narrow end
Example: innerlining of alimentary canal, cystic duct
· Cuboidal: Cube shaped cells and provides mechanical support and helps in secretion and absorption.
Example: Kidney tubules
· Glandular: Tissue folds inward and forms multicellular gland and secretes substances at the epithelial surface.
Stratified Epithelium: Cells are arranged in a many layers and are capable of cell division. Regions which are exposed to greater wear and tear such as epidermis of skin and lining of rectum are made up of stratified epithelium.
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The most simplest type of protective tissue that covers all the majority of organs in animal bod is Epithelial tissues.
Functions: Epithelial tissues almost cover every organ in body and also separates organs from each other. The structure and function of epithelial tissues varies depending upon their location.
For example: Grandular epithelial tissues in stomach, contains glands which secretes enzymes and digestive juices.
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