NEET BIOLOGY

Detailed explanation-1: -Fibroblasts are the most abundant cells of the areolar tissue. It produces fibres called fibroblasts in their young active phase and fibrocytes when they are old and inactive. It synthesises proteins called collagen, elastin and reticulin.

Detailed explanation-2: -Loose connective tissue (LCT), also called areolar tissue, belongs to the category of connective tissue proper. Its cellular content is highly abundant and varied. The ECM is composed of a moderate amount of ground substance and two main types of protein fibers: elastic and reticular fibers.

Detailed explanation-3: -Areolar connective tissue is a type of dense, irregular connective tissue found in the human body. It consists mainly of a network of fibres and cells which are held together by a gel-like matrix.

Detailed explanation-4: -Fibroblasts are mesenchymal cells derived from the embryonic mesoderm tissue, and they are not terminally differentiated. They can be activated by a variety of chemical signals that promote proliferation and cellular differentiation to form myofibroblasts with an up-regulated rate of matrix production.

Detailed explanation-5: -Fibroblasts seem to be the least specialized cells in the connective-tissue family. They are dispersed in connective tissue throughout the body, where they secrete a nonrigid extracellular matrix that is rich in type I and/or type III collagen, as discussed in Chapter 19.