Structure Of The Skin




Internal Structure Of The Skin



Is good to know the structure of the skin first if we want to understand how the skin ages. The skin is the largest organ of the body and is composed of several human skin layers.





Structure Of The Skin
The main functions of the skin are:

  • Protecting our internal organs.

  • Help us resist bacteria and infection.

  • Prevents excessive water loss.

  • Gives shape to the body.

  • Let our body breathe.




Layers Of Skin


The skin structure is made up of three major skin layers:


The Epidermis


What is epidermis? Is the thinner outer layer of the skin. Is made up of several layers. Layers of the epidermis-

  • Queratinocytes (Keratin).

  • Melanocytes which produce melanin and determines the shade of our skin.

  • Langerhans which form part of the immune system.


The skin epidermis is composed by many nerve endings. New cells are constantly forming in the lower epidermis, and the oldest cells travel to the surface in a 30 day cycle where are worn off. Meanwhile, the new cells are ready beneath to replace the old ones.

So, what happens to the structure of the skin as we age?

The upper epidermis becomes thinner, and the cells start to divide more slowly. Dead skin cells don't shed as quickly, causing the skin to look aged. There is a loss of melanin producing cells which protect us from UV radiation, and age spots begin to appear.


The second skin layer is:


The Dermis.

Is the middle skin layer and is the skin's main foundation. The dermis contains the proteins collagen, see collagen information , and elastine which give the skin support and elasticity.It contains

  • Blood vessels

  • Sweat glands

  • Nerves

  • Hair follicles


As we age the dermis becomes thinner and collagen and elastin, the skin's connective tissues, start to loose their elasticity. The skin's ability to retain moisture diminishes; becoming dryer.


The third layer of the skin is called:


The Subcutaneous

Is the deepest skin layer and is composed of fatty tissue. It provides nourishment to the upper layers of the skin. Protects the body from heat and cold and acts like a cushion to internal organs. It contains

  • Nerve endings

  • Hair follicles

  • Sweat glands

  • Blood vessels that are lengthen to this layer from the dermis.


The depth varies from person to person, depending on how fat you are. The fat in the subcutaneous layer decreases as we get older, and the epidermis starts to sag, see sagging skin .

By having more knowledge of the structure of skin and understanding how aging affects the skin, you will be on your way of having the best skin possible.





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All the content given in this guide is for
information only and is NOT intended as a
substitute for your doctor.

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