This matrix is secreted by the cells. Supporting connective tissue Gives strength, support, and protection to the soft parts of the body. The matrix of bone contains collagen fibers and mineral deposits. 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.