Which health-related component should start your warm-up?
Your

How do the uv rays cause damage?   what exactly causes the skin to burn;   can you be more specific about this mechanism?   3. how do photosensitive medications increase a person's sensitivity to sunlight and therefore increase their risk of getting burned?     what kind of medications can increase photo-sensitivity, can you think of some examples?

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Which of these is the muscular tube that leads from the mouth to the stomach? a.epiglottisb.uvulac.soft palated.esophagus