Abstract
Diversity of effects of radiation on distinct cell types suggest that mitochondria could be the most important organelle in metabolism of radiation. Mitochondria is known as metabolic machine of cells providing energy. According to the amount of mitochondria content, cells work with different functions. For example, skin cells present fewer amount of mitochondria than heart muscle cells. Inner (basal) layer of skin cells reproduce self and grow to outer layers slowly. Outer layers of skin cells’ mitochondria disappear, gradually die and keratinize to protect inner tissue. Light, sometimes only sun radiation exposure of skin cells can cause inflammation, keratinized layers peel off, basal reproductive skin cells over grow, even genetic mutate to form skin tumor. However, not higher risk rate of skin tumor in children, it maybe because the earlier and severer inflammation alert and avoid the young people expose in long high dose of radioactivity.
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