Which component in the skin is primarily responsible for providing structural strength and elasticity?

The component in the skin that primarily provides structural strength and elasticity is collagen, which is a key protein found abundantly in the dermis. Collagen fibers form a network that provides rigidity and strength to the skin, helping it maintain its structure and resist deformation. They are crucial for the skin's durability and resilience, allowing it to withstand stretching and pressure.

While elastin also contributes to skin elasticity, it is primarily responsible for allowing the skin to return to its original shape after being stretched. Keratin is a protein that contributes to the barrier function of the skin but does not play a significant role in elasticity or overall structural strength. The dermis is the layer of skin where collagen and elastin are located, but it is the collagen specifically that is key for providing the structural integrity and strength needed in the skin.