Final answer:
Connective tissue is made of cells, ground substance, and protein fibers such as collagen and elastin, all synthesized by fibroblasts. These components provide structural and functional support to the tissue.
Step-by-step explanation:
Connective tissue is composed of three essential components: cells, ground substance, and protein fibers. Among these, the primary cell responsible for producing the fibers is the fibroblast, which synthesizes and maintains the extracellular matrix. The protein fibers include collagen fibers, which provide tensile strength and flexibility, elastin fibers that contribute elasticity, and reticular fibers that form a supportive mesh. The ground substance, consisting largely of proteoglycans and water, fills the spaces between cells and fibers, contributing to the tissue's functional properties.