How does collagen help in tendon function?

Collagen is a critical protein in tendons, primarily known for its role in providing tensile strength. The structure of collagen fibers allows tendons to endure significant forces and resist stretching, which is essential for their function in connecting muscles to bones and facilitating movement. This tensile strength ensures that tendons can withstand the stress produced during muscle contractions and exertion, making them capable of transmitting forces effectively without tearing or failing.

While elasticity and flexibility are important characteristics in other tissues, tendons prioritize strength over these properties. Absorbing shock is more characteristic of other connective tissues, such as cartilage, which is designed to absorb impacts. In contrast, the primary role of collagen in tendons is to maintain structural integrity and support forces, which is why it significantly contributes to their tensile strength.