What are Fibroblasts? Fibroblasts are connective tissue cells that secrete the components that make up the extracellular matrix and the stroma. Both these structures provide a supportiv framework that keeps cells, tissues, and organs in their proper places. There are many different types of fibroblasts located in organs and tissues throughout the body. The main structural protein secreted by … Continue reading Fibroblasts: Oh, the Places You Will Go . . .