Elastin fibers–Reticulin fibers–Ground substance: made up of proteoglycans (PGs) and glycoproteins.•PGs is to hydrate the matrix, stabilize the collagen networks, and resist conpressive forces•Glycoproteins provides the linkage between the matrix and between the cells and matrix–Ground substance: containing water to reduce friction and may helo prevent excessive cross-linking between fibers by maintaining space between fibers