Which of the following is a fibroblast cell?

• A. Fibroblast Cells
• B. Mast Cells
• C. Histiocytes
• D. Leucocytes

Answer: (A)

Fibroblasts are the cells in connective tissue that manufacture collagen and other components of the extracellular matrix, forming the structural framework of skin and supporting tissues and playing a key role in wound repair. They are not immune cells. Mast cells are involved in inflammatory and allergic responses and release histamine. Histiocytes are tissue macrophages that clean up debris, and leucocytes are white blood cells that fight infection. In the context of skin structure and healing, fibroblast cells are the ones responsible for building the matrix that gives skin its strength, so this option is the correct one.