Think of a tissue metres in length yet integral; let it be a tissue bearing features that provide simultaneously both heating and cooling; firm yet very aesthetic, that can offer a very effective protection against all external effects. Body organs aren't all internal like the brain or the heart. There's one miraculous organ we wear on the outside. That is our skin, the largest organ of the body, covering 1 to 2 square meters. It forms a vital boundary separating the outside world from the inside of your body. This fleshy covering does a lot more than make us look presentable. In fact, without it, we'd literally evaporate.

The skin is an extremely multipurpose organ: it is waterproof yet flexible; it helps keep you warm and cool; It also exudes antibacterial substances that prevent infection and manufactures vitamin D for converting calcium into healthy bones. It is a sensory organ to detect temperature, touch, vibration and a visible signal for social and sexual communication. The skin can sense 5 different kinds of stimulation: touch, pressure, heat, cold, and pain. It purifies our system by eliminating waste fluid. Our skin is resilience to injury - resumes its previous shape withstanding considerable trauma w/out permanent damage. Skin grows faster than any other organ and we keep renewing our skin our entire lives.

The skin helps regulate the body's temperature efficiently. Since the temperature of the external environment is constantly changing, the skin must work constantly to keep the body's temperature 36,8 Celcius degree. Your skin can respond to messages sent out by your hypothalamus, the brain's inner thermometer. Blood vessels here help regulate body temperature by increasing blood flow to the skin to allow heat to escape, or by restricting the flow when it's cold. Another mechanism that cools the body down is sweating: the human skin is full of many tiny holes called "pores". The water thrown out uses the body heat to vaporise and this causes coolness.

Skin tissue, like many other structures, is an organ important enough that its absence puts human life at risk. It is impossible for a living being to survive without skin, even if it has all of its organs. The view we would come across when we look at a centimetre below the skin is a picture formed by these lipids and proteins, with various vessels therein. It is not aesthetic at all, and even terrifying. Covering all these structures, the skin both makes a very aesthetic contribution to our body. All of the functions of the skin are vital. The skin is a more important organ than the ear, nose and even the eye. We can live without our other sense organs, but it is impossible for man to survive without skin.

What all of this shows is that human skin is a perfect organ specially designed to facilitate our lives. Skin protects us, functions as an "air-conditioner", and facilitates easy locomotion thanks to its flexibility. Moreover, it is aesthetic. Instead of this type of skin, we could well have a thick and coarse skin. It may be thought that its protective quality would increase if it were thicker and harder, but this is deceptive. If we had a skin as hard and thick as that of the rhinoceros’, our highly mobile body would lose this mobility and be clumsy. We could have skin that would cause us to faint from heat in summer and freeze in winter. However, our bodies are covered in the most comfortable, serviceable and aesthetic way.