Your baby's skin
Functioning as a protective envelope around our bodies, our skin is made up of three main layers: the epidermis, dermis and hypodermis.
- The epidermis is the uppermost layer of our skin. It is made up of several layers of cells referred to as keratinocytes. These cells start off life at the very bottom of the epidermis and then gradually move up to the uppermost layer of the skin. Once they arrive at the surface, they lose their nuclei, get filled with keratin and form what is known as the “corneal layer”. This is a semi-permeable shield made up of degraded keratinocytes (corneocytes) linked together by lipids and proteins complexes. The corneal layer serves as a barrier, protecting our bodies against outside attacks.
- The surface of the epidermis is covered with a mixture of perspiration and sebum referred to as the "hydrolipidic film”. This fatty substance keeps the skin moisturized and forms an antibacterial and antifungal barrier.
- Located beneath the epidermis, the dermis serves as a support structure, and is very important for the skin's firmness and elasticity. It contains elastin and collagen fibers, among other things.
- The hypodermis is the deepest layer of our skin. It is mainly made up of fatty cells - adipocytes - which protect our bodies against variations in temperature and form a protective mattress against the pressure to which our skin is subjected.