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Describe the molecular composition, morphological characteristics, distribution & functions of fibres in connective tissue

Question

Describe the molecular composition, morphological characteristics, distribution & functions of fibres in connective tissue

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Solution

Connective tissue fibers are primarily composed of proteins, and there are three main types: collagen fibers, elastic fibers, and reticular fibers.

  1. Collagen Fibers: These are the most abundant fibers in connective tissue. They are composed of the protein collagen, which provides flexibility and strength. Collagen fibers are often arranged in bundles and can resist high tensile forces. They are found in various connective tissues including bone, cartilage, tendons, and ligaments.

  2. Elastic Fibers: These fibers are composed of the protein elastin, which allows for stretch and recoil. They are thinner than collagen fibers and form a branching network within the tissue. Elastic fibers are found in tissues that require elasticity, such as the skin, lungs, and blood vessels.

  3. Reticular Fibers: These are the thinnest fibers and are composed of collagen and a coating of glycoprotein. They form a mesh-like network that supports cells and ground substance of many tissues. Reticular fibers are found in the lymph nodes, spleen, and bone marrow.

The distribution of these fibers varies depending on the specific needs of the tissue. For example, tendons and ligaments, which need to withstand tension, have a high proportion of collagen fibers. On the other hand, tissues that need to stretch, like the skin and lungs, have a higher proportion of elastic fibers.

The primary function of fibers in connective tissue is to provide support and strength to the body's tissues and organs. Collagen fibers provide tensile strength, resisting stretching and maintaining the shape of the tissue. Elastic fibers allow tissues to return to their original shape after being stretched or deformed. Reticular fibers provide a supportive framework for the cells and ground substance of many tissues.

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