Which cell is primarily responsible for producing connective tissue fibers?

• A. Fibroblast
• B. Adipocyte
• C. Erythrocyte
• D. Osteoblast

Answer: (A)

The main concept here is identifying which cell type makes the fibers that form the connective tissue’s extracellular matrix. Fibroblasts are the primary producers of connective tissue fibers, including collagen, elastin, and reticular fibers. They live in connective tissue proper and synthesize the components that create the supportive framework of tissues, secreting collagen and elastin precursors that become mature fibers.

Adipocytes store fat and don’t produce connective tissue fibers. Erythrocytes are red blood cells whose main role is transport, not matrix production. Osteoblasts form bone matrix, which is a specialized connective tissue; they do generate collagen in bone, but their job is specifically to build bone rather than to produce the fiber network of most connective tissues.