Body

That's how your wounds heal

Unlike almost all other organs, the skin has the unique ability to repair itself.

Even large wounds can often heal without forming scars. The white blood cells of the immune system cause inflammation, which ultimately has a healing effect.

Inflammation promotes natural healing

  • 10 minutes - solidification

    The healing process of the skin starts when the damaged blood vessels (red dots) contract. The protein fibrin (blue stripes) is released and causes the blood to clot and the bleeding to stop.

  • 48 hours - late inflammation

    So-called neutrophil granulocytes (dark purple) trigger inflammation, and macrophages (light purple 'flowers') excrete biochemical substances that signal that the wound must close.

  • 72 hours - growth phase

    Fibroblasts (blue), which form collagen (white stripes), and keratinocytes (purple chain on the skin) pull to the wound and restore the dermis and its fine blood vessels.

  • Weeks to months - ripening phase

    The maturation phase starts after the so-called growth phase. The temporary solutions are relieved by sustainable repairs.

Show more Show less

Popular Posts

Category Body, Next Article

What makes animals' eyes shine in the dark?
Animals

What makes animals' eyes shine in the dark?

That the eyes of cats and other animals glow in the dark is due to a layer in their eye, the tapetum lucidum. This layer is behind the light-sensitive retina and reflects the light that passes through it. The light-sensitive cells in the eye can use the light again. The reflection increases the light sensitivity of the eyes considerably (with cats by around 50 percent) and is therefore especially useful for nocturnal animals.
Read More
Why do dogs wag?
Animals

Why do dogs wag?

A dog's tail has two main functions. The first is balance: it helps the dog to stay in balance while running and jumping. For example, if the animal suddenly wants to change direction, it uses its tail as a kind of counterweight to turn its abdomen. The second function is communication.
Read More
Ingenious techniques give animals extra speed
Animals

Ingenious techniques give animals extra speed

The long legs of frogs work as a slingshot Frogs are among the best jumpers in the entire animal kingdom. Some species can jump up to 20 times their own height. Because of their long legs, they can deposit longer, giving them more jumping power. Before they jump, frogs put on their leg muscles, tightening the tendons in the ankles like a catapult.
Read More
Dangerous metamorphoses
Animals

Dangerous metamorphoses

### Ant is ticking time bomb Ants live in the rain forests of Southeast Asia who sacrifice themselves to kill their opponents. One of them has the appropriate name South Asian puff ant (Colobopsis explodens). When other insects try to invade the colony, this ant inflates itself.
Read More