Final answer:
Connective tissue matrix is composed of cells, ground substance, and protein fibers.
Step-by-step explanation:
Connective tissue matrix is composed of cells, ground substance, and protein fibers. Connective tissues are made up of a matrix consisting of living cells and a non-living substance called the ground substance. The ground substance is made of an organic substance (usually a protein) and an inorganic substance (usually a mineral or water).