Connective Tissue

Hello dosto , aaj hum apko connective tissue ke baare me btaenge. 

Connective ka means hi join hona hota hai , chaliye esko hum details me samjhte hai. 

Connective tissue

1. Connective tissue is the most aboundant tissue in the body.

2. The connective tissue cells are more widely separated from each other in epithelial tissue.

3. Intercellular substance ( Matrix ) is present in large amounts.

4. There are usually fibres present in the matrix , which may be of a semi-solid jelly like consistency , dense and rigid , depending upon the position and function of the tissue.

Components of connective tissue  :— 

1 - Cells 

2 - Extracellular Matrix 

•} Cells 

They contain 6 types of cells such as —

• Fibroblasts

• Fat cells ( Adipocytes ) 

• Macrophages

• Leukocytes ( WBC ) 

• Mast cells 

• Plasma cells 

•} Extracellular Matrix 

They contain 2 types of matrix such as —

• Fibres

• Ground Substance 

1. Cells of connective tissue — 

Various types of cells are present in connective tissue.

Fibroblasts :—

It is present in large numbers of the connective tissue. They are responsible for the production of collagen elastic , reticular fibres , and ground substance. They're are large  , flat , branching cells or spindle shaped. 

Fat Cells :—

It is known as adipocytes , these occur singly or in groups in many types of connective tissue and are especially aboundant in adipose tissue. They are vary in shape and size according to the amount of fat they contain.

Macrophages :—

They are irregular cells with granular cytoplasm. They are important in body's defence machanism and help the body to get rid of deal or dying cells , bacteria and other foreign bodies.

 Leukocytes (WBC) :—

They are normally found in small number in healthy connective tissue. They've secrete antibodies and play an important role in tissue defence.

Mast Cells :—

They secrete heparin , histamine and other substances , which are released when cells are damaged by diseases or injury.

Plasma Cells :—

These develop from B - Lymphocytes , a type of white blood cells . They synthesis and secrete specific defensive antibodies into the blood and tissue.

2. Extracellular Matrix —

Fibres :—

Fibres strengthen and support the connective tissue and are of three types —

• Collagen Fibres :- Collagen Fibres are fibrous protein and are secreted into the Extracellular space and they provide high tensile strength to the matrix. 

It is present in bundles.

• Elastic Fibres :- Elastic Fibres are long , thin fibres that form branching network in the extracellular matrix. They help the connective tissue to stretch and recoil. 

• Reticular fibres :- Reticular fibres are short , fine collagenous fibre that can branch extensively to form a delicate network. They provide support and strength.

Ground Substance :—

The ground substance supports and binds cells together. It provides a medium for exchange of materials , stores water , and is active in influencing cells functions. The ground substance include water , glycoproteins and matrix.

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