Collagen

Collagen is the most abundant protein in the body, making up most of the body's connective tissues and being the primary component of tendons, ligaments, and skin. It's also a major component of the cornea, cartilage, bone, blood vessels, the digestive tract, and spinal discs.
Collagen is formed of a wound triple helix forming very long, strong strands.
Collagen at Wikipedia
Category:Anatomy
Category:Biology