What role do fibroblasts play in tissue healing?

• A. They migrate to the site of injury.
• B. They synthesize collagen and extracellular matrix components.
• C. They trigger inflammation.
• D. They form new blood vessels.

Answer: (B)

Fibroblasts play a crucial role in tissue healing primarily by synthesizing collagen and extracellular matrix components. This process is essential for the formation of granulation tissue, which acts as a scaffold for new tissue growth and repair. Collagen, produced by fibroblasts, provides strength and structural integrity to the healing tissue, while other extracellular matrix components help in cell adhesion and support the migration of other cells involved in the healing process.

Although fibroblasts do migrate to the site of injury as part of their function, the core aspect of their role in healing is the synthesis of collagen and the extracellular matrix. This synthesis is fundamental for restoring tissue architecture and facilitating recovery after injury. Other processes, such as inflammation and angiogenesis (the formation of new blood vessels), do involve different cell types and mechanisms, but fibroblasts are specifically integral to the repair phase by ensuring the production of the necessary components that support tissue integrity and function.