People with lighter skin have less pigmentation. Usually this occurs from Vitamin D deficiency of a descent group. We obtain vitamin D through sun exposure, so granted when we do not have access to sunlight we become deficient in it. Apply this to a population of people over time, and skin tone adapts within that population. People who "burn easily" have adapted to survive without access to the sun--therefore, when they spend to much time outside they "burn up." And here is where the clever sunscreen propagators come in...
people with light skin have less melancholia or melanin or melatonin
People with light complexions have less skin pigmentation. Skin pigmentation absorbs ultraviolet radiation and protects your DNA from damage from the sun. If you have less pigmentation and less protection for your DNA you are more likely to get skin cancer. This is why it is recommended that you should wear sunscreen.
Melanin is the pigment which helps our skin to be defensive against over exposure. Normally when you are exposed to sun light the skin will produce melanin automatically. But people from cold climates won't need melanin as the sun light is not strong over there. So people from colder area tend to be white. But people from hotter climates need melanin to prevent sun burn so their body is programmed to do so. More melanin means the darker the skin. The reason why melanin turns our skin to black is, black color can absorb the light, but white will reflect the light. If the light is being reflected only the skin will be exposed to heat and that will damage the skin which is sunburn. But dark skin will absorb the heat and transfer the heat to the inner body parts under the skin and thus by having less damage on the skin.
yes some light rays do reflect from human skin but they are so less that they are almost ignorable. human skin's got pores and so majority of the light rays enter through them. hence human skin does not reflect back light as shiny sufaces like mirror etc. do (That is the reason why other people are almost invisible to you.)
U can find dark skin people in south .light and white skin in north
Because of interaical relationships.
Black peoples skin is dark because their is an abundance of sunlight in most of Africa and their dark skin prevents too much absorption of vitamin D. White people's skin is light because in most of Europe there is alot less sunlight and the skin is light to help absorb as much vitamin D as possible.
Because light skin just reflexs the light and the dark skin due to its colour absorbs the heat and don`t burn the skin.
Melanin recessive are those with light skin, light eyes, and light hair.
no. less
Well, usually there skin is light brown from my view.
because darker skin contains higher levels of melanin(sp?) think of that as an interrior (or sub dermal)suntan lotion. I THINK I think it is more of a man caring for the skin such as lights, which means using sun protection because dark skin contains higher levels of melanin than others. Yes, because of melanin in dark skin, people with this skin coloring are less likely to get skin cancer than people with light skin. The pigmentation in dark skin is the key factor to not receiving compared to someone with light skin. It's all about the how the skin cells multiply. Now, that doesn't mean people with dark skin still can't get skin cancer. THEY CAN wherever there's light skin on them such as the skin underneath your fingernails, palms, and bottoms of their feet.