A patient with atrial fibrillation had dual lead

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?

Which part of the female reproductive system produces sex hormones and contains eggs? the uterus the ovaries the vagina the fallopian tubes

Describe three ways in which technology has treat the flu