MICROANATOMY

Detailed explanation-1: -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.

Detailed explanation-2: -Fibroblasts are the primary blast cells of the connective tissue proper; hemocytoblasts are the primary blast cells of the blood; chondroblasts and osteoblasts are the primary blast cells of cartilage and bone, respectively.

Detailed explanation-3: -The extracellular matrix of both loose and dense connective tissue proper is composed of amorphous ground substance, extracellular fluid, and collagen and elastic fibers. The amorphous ground substance is a gelatinous material surrounding the fibers and permitting extracellular fluid to diffuse through.