Skin is the largest organ of our body and 16% of our body weight is contributed by the skin. The overall skin is around 20 square feet in length and plays a very important role in protecting our body. Skin regulates the body temperature and acts as a barrier to the external organisms like bacteria and virus which try to enter the body through skin.
The sunlight that penetrates through our skin is essential for producing Vitamin D. There are 2 main layers of the skin, namely epidermis and dermis followed by the thick layer underneath known as subcutaneous layer.
Epidermis – The epidermis has 3 types of cells namely Keratinocytes, Melanocytes and Langerhans cells. Keratinocytes are responsible for producing the protein called Keratin, our hair is made up of this protein. Melanocytes produce melanin which saves our skin from the UV rays of skin, melanin also determines the colour of our skin.
Langerhans cells are a part of the immune system and protect our us from foreign particles that can pass through the skin. The epidermis has many nerve endings, as a result it gives us a sense of touch.
Dermis – The dermis is a thick layer of skin and is made up of connective tissues which are supple and sturdy. This layer of skin contains cells like elastin and collagen which are known to give firmness and improve the texture of the skin. Dermis also supports blood vessels and tiny lymph’s.
Subcutaneous – This layer is below the dermis and consists of connective tissues and fats. It helps in regulating the temperature of the body since this layer of the skin is thick and fat it insulates the body. The thickness may vary in different regions of the body and is a source of energy for the body.