The most abundant mineral is calcium phosphate, although magnesium, carbonate, and fluoride ions are also present. It binds body parts together. Tendons connect muscle to bone. The matrix is principally collagen, and the fibers are all oriented parallel to each other. Tendons are strong but not elastic.
Ligaments attach one bone to another.
They contain both collagen and also the protein elastin . Elastin permits ligaments to be stretched. It is distributed throughout the body. It serves as a packing and binding material for most of our organs. Collagen, elastin, and other proteins are found in the matrix.