Final answer:
Connective tissues consist of cells, ground substance, and protein fibers, with the ground substance being a crucial component determining tissue characteristics.
Explanation:
Connective tissues are composed of cells, ground substance, and protein fibers. The ground substance is a gel-like matrix of glycoproteins and proteoglycans that occupies the space between cellular and fiber elements in the connective tissue. The matrix in connective tissues determines the tissue's density and characteristics, such as permeability.
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