Connective tissue is composed of three types of fibres and nonfibrous ground substanceCollagen fibers: Resist tensile deformation and are responsible for the strength and stiffness of tissuesixes classes with 19 types of collagen; the tendon and ligaments mostly contain type I collagen, which is highly resistant to tensionAs collagen fibers develop and mature, they bind initially with unstable hydrogen bonding, which then converts to stable bonding