The Transportation Security Administration (TSA) is replacing most metal detectors with imaging devices that reveal items hidden underneath passengers’ clothing. But some experts worry that the new machines could expose travelers to health risks. And there are obvious concerns about privacy issues, too. There are actually two types of scanners, both of which require...
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Vermilion border  the exposed red portion of the upper and lower lips. It extends from the junction of the lips with the surrounding facial skin on the exterior to the labial mucosa within the mouth. Actinic chelitis is caused by chronic and excessive exposure to the ultraviolet radiation in sunlight. There is thickening whitish...
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