Ever wondered why our skin does not tear under stress? There are four specific mechanisms in collagen — the main structural protein in skin tissue — that act synergistically to diminish the effects of stress, a research reveals.

“Collagen fibrils and fibres rotate, straighten, stretch and slide to carry load and reduce the stresses at the tip of any tear in the skin,” said study leader Robert Ritchie from the Lawrence Berkeley National Laboratory (Berkeley Lab) in California.

“The movement of the collagen acts to effectively diminish stress concentrations associated with any hole, notch or tear,” Ritchie added. Skin consists of three layers — the epidermis, dermis and endodermis.

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