Question

The types of fibres found in connective tissues are
(A). Collagen fibres
(B). Elastic fibres
(C). Reticular fibres
(D). All of the above

Answer 1

Hint: Fibres are natural substances that are produced by animals, plants or in several geological processes. Plant fibre is also called phloem fibre or bast fibre. It is found in some dicot plants. Plant gets strength from it and helps in support of the conductive cell of phloem tissue. Besides, animal fibres including fur, silk, feathers are naturally produced fibres that are mainly composed of proteins.

Complete step by step answer:
Let’s discuss the options and find the correct answer.
- Collagen fibre is a type of protein fibre that is abundant in the extracellular matrix of different connective tissues. It gives strength to the body and helps in cushioning the body parts. Mainly tendons, ligaments, bones, cartilages are the part where collagen is mainly found.
- Elastic fibres are also called yellow fibres. It is noticed in the extracellular matrix of several connective tissues. Elastin, oxytalan, elaunin are the types of several elastic fibres. When the elastic fibres are built up in tissues it is called elastosis. It acts as a degenerative disease.
- Reticular fibres are also called reticulin. It is a connective tissue mainly composed of collagen i.e. Type III collagen. Reticular cells help in the secretion of this type of collagen. Hence it is called reticular fibre. It is mainly found in bone marrows, liver or in several lymphatic systems.
Hence, option D: All of the above is the correct answer.

Note: Tropocollagen molecules are secreted by fibroblast cells while reticular fibres are present in the form of a network of meshwork.