It is the most abundant protein found in the body. There are 13 different types of collagen. Chains of amino acids make up collagen. These chains form collagen molecules which in turn, from fibrils. These fibrils produce fibers.
Bundled fibers lead to body tissue formation.
Distribution and orientation of collagen reflects the function of the tissue in which it is found. For example, it is collagen that transmits tension in tendon, lends structural support in skin and bone and limits expansion in arteries. Collagen plays an integral part during each phase of wound healing and is an excellent hemostatic agent. It absorbs 40 - 60 times its weight in fluid. When applied to a wound, collagen initially acts as a hemostatic agent.