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The Science of Skin Color
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Understand the science behind our skin colour and how we evolved over time with variations in our skin.
Unacademy Bytes
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Unacademy user
KS
Sir, please take forward this science journey we would very much appreciate some lectures covering core biology areas like the endocrine system, human physiology, nervous system etc from which sometimes very tricky questions have been asked. Thank You!
1
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amazing fact explained in an interesting way by an awesome educator thank you
5
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Roshan Gupta
2 years ago
indeedly,they are awaring to the various things which in our environment.
Very interesting and informative. Hello Unacademy Bytes team, Also bring up second part of this very video which explains How the High Melanin people in North compensate for Vitamin D naturally, or how body actually adapts to such unlikely conditions?
1
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super explanation thank you
0
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interesting topic.. Thank be Mam your voice is amazing...????
3
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Very interesting topic nd a gud way of teaching Mam...
0
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  1. HUMAN BRAIN


  2. HUMAN BLOOD*.


  3. HUMAN BONES


  4. Why isn't it the same with our skin color?


  5. THE SCIENCE BEHIND SKIN COLOR


  6. Source: Dept. of human evolutionary biology


  7. Different wavelengths of light are reflected or absorbed by a pigment on the top layer of our skin Melanocyte Melanin MELANIN


  8. Eumelanin Pheomelanin Melanocyte Melanin The more the Eumelanin, the darker the skin


  9. North Pole Arctic Circle 60 N Low Angle of Lin Incoming Sunlight 30 N Tropic of Cancer Equator Sunlight Strikes Sun Most Directly Tropic of Capricorn 30 S 60 S Antarctic Circle Low Angle of Sun Incoming Sunlight Atmosphere South Pole


  10. Arctic Circle 60 N Low Angle of Lin Incoming Sunlight 30 N Tropic of Cancer 50,000 years ago Equator Sunlight Strikes Sun Most Directly Tropic of Capricorn 30 S 60 S Antarctic Circle Low Angle of Sun Incoming Sunlight Atmosphere South Pole


  11. Before After: Incoming UV photon Damage to DNA when skin is overexposed


  12. UVA UVB UVA UVB The melanin in skin determines how protected you will be from the sun


  13. Some of our ancestors who were adapted to the tropic spread to other parts of the world


  14. What happened in the north?


  15. Vitamin In


  16. Risk of Vit D deficiency due to lack of optimal UV exposure