nerves and blood vessels that service a muscle fiber are located in the connective tissues of its
Blood vessels and muscle tissue are also derived from mesenchyme, so that blood vessels and muscles are always embedded within connective tissue. Nerves grow out into connective tissue from the neuroectodermally derived central nervous system, so nerves are also embedded in connective tissue.XTRACELLULAR 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.