Heals three times longer / day
Given the common origin, researchers suspect that we have lost a faster recovery in an ancient phase of evolution. Magazine Proceedings of the Royal Society B: Biological Sciences The published report on the study states that human wounds heal approximately three times slower than the same wounds, including chimpanzes for our closest relatives. Human wounds heal in several stages. Blood clotting is first triggered to prevent littering. Then immune cells such as neutrophils and macrophages are disturbed to the injured area to destroy bacteria, remove dead tissue and dirt.
The body then restores damaged tissues. Fibroblast cells begin to produce collagen, a protein that provides structure and durability, forms new blood vessels to supply nutrients; And skin cells migrate across the wound to cover it. Other mammal species use a slightly different method. For example, rats, mice, horses and cats apply a so -called wound contraction in which the edges of the wound are tightened together as suturing. « This discovery points out that the slow healing observed in humans is not characteristic of primates and highlights the possibility of evolutionary adaptation in humans, » wrote researchers from the University of Kyoto in Japan. They are inclined to think that changes have occurred in the period when people lost thick body hair. At that time, the skin became thicker and the need for a more fundamental wound closure mechanism.
