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THE CORPUS CALLOSUM AND STEREOPSIS. The corpus callosum, a huge band of myelinated fibers, connects the two cerebral hemispheres. Stereopsis is one mechanism for seeing depth and judging distance. Although these two features of the brain and vision are not closely related, a small minority of corpus-callosum fibers do play a small role in Stereopsis.
EXTRACELLULAR MATRIX. The extracellular matrix of connective tissue is composed of ground substance and fibers. In ordinary connective tissue, the ground substanc e consists mainly of water. The principal fiber type is collagen (the most abundant protein in the body), with elastic fibers as a minor element.he extracellular fibers of connective tissue are traditionally classified into three types: 1  Collagen fibers confer main tensile strength, and are the stuff of scars. 2  Elastic fibers confer elasticity. 3  Reticular fibers (really, a special form of collagen) provide a delicate supporting framework for loose cells.