What role does collagen play in connective tissues?

Collagen is a crucial structural protein found in connective tissues, and it primarily provides strength and structure. It forms a scaffold that helps tissues maintain their shape and integrity, supporting various body parts including skin, bones, cartilage, and tendons. The high tensile strength of collagen fibers makes them essential in resisting stretching and mechanical stress, which is vital for maintaining the overall health and durability of connective tissues.

In contrast, while other proteins contribute to the elasticity of tissues, collagen is primarily responsible for their strength and structural support. The roles of stretching and elasticity are typically associated with different proteins like elastin, which works alongside collagen to allow tissues to stretch and return to their original shape. Blood circulation is aided by the vascular systems in the body rather than by collagen itself.