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Well friends, we all have skin and it serves multiple purposes.

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Like, it is an essential barrier or our first line of protection against the outside environment.

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It is a crucial part of one of our five senses.

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It absorbs sunlight for Vitamin D and heat and controls our internal temperature..

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..and permits the sensations of touch, heat and cold.

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But, how does it work?

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Well, your skin is made up of three layers.

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The epidermis, dermis and hypodermis.

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Let's start with the first layer known as epidermis.

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The epidermis is the outer layer of skin and is made up mainly of skin cells.

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The cells on the very outer layer of the epidermis are constantly dying..

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..and getting replaced by new cells every four weeks.

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As the new cells are formed, the older ones are pushed up.

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Once they reach the surface area, they provide a waterproof barrier..

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..from the invading microbes and other external forces.

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The epidermis also contains melanin that sets the tone of your skin.

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More the melanin, the darker the skin.

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skin melanin also helps to protect from harmful sun rays but it has its limits

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and that's why we need some sunscreen now let's go to the second layer known

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as the dermis the dermis contains tough connective tissue hair follicles sweat

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glands and nerve endings through which the skin sends the messages to the brain

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about all the things you touch then the brain and the nervous system decides how

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to respond towards it for example if you touch something too hot your nervous

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system will tell your brain to move away from it the dermis also contains the

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sweat glands where the sweat is generated and poured out all the way

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through the epidermis where the sweat comes out of the holes called pores that

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helps to regulate your body's temperature and the last part of your

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skin layer is called the hypodermis also known as subcutaneous tissue and is made

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up of fat and connective tissue the hypodermis is primary function is to

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store fat the body needs some level of fat to cushion and protect your bones

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and organs also it helps us to keep our body nice and warm