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Results 1 - 2 of 2 for Don
  1. Sun's effect on skin Video 
    ... or kill skin cells. People, especially those who don’t have much melanin and who sunburn easily, ...
    https://medlineplus.gov/ency/anatomyvideos/000125.htm -
  2. Ultrasound Video 
    ... hollow areas like the chambers of the heart don't reflect sound waves. So they show up ...
    https://medlineplus.gov/ency/anatomyvideos/000134.htm -