Then make your thumb print. Their job is to make the protein pigments that give your skin its colour. These pigments are called melanins. The interesting thing is that no matter what the colour of your skin, you have exactly the same number of melanocytes as anybody else. The difference is that people with a darker skin have more melanin pigment than those who have a lighter skin.
Melanin helps to protect the skin from the harmful rays of the sun.
In fact, scientists say that the colour of your skin does not really make you different from other people. They have proven that under the skin, we are all the same and that there is actually only one race, the human race. Of course, we know that peoples colour often makes a lot of difference to the way they are treated in society. Sometimes people can't get jobs, or they get paid less money, they might even by hurt physically or called names. This is called racism.