Countless studies have proved that smoking causes lung cancer, and we now know that it substantially increases a person's risk of developing cancer of the larynx, pharynx, oral cavity, esophagus, bladder, kidney, and pancreas. Additional studies suggest a
Of the energy reaching the earth's surface 99% is ultraviolet through to middle infra-red. The shorter wavelengths of ultraviolet are filtered out by ozone in the stratosphere and by the atmosphere. The response of skin to solar radiation depends on the w
A mammogram is a safe, low-dose x-ray picture of the breast. Mammogram are taken during a mammography exam. There are two kinds of mammography exams-screening and diagnostic
Every organ in the body is made up of various kinds of cells. Cells normally divide in an orderly way to produce more cells only when they are needed.This process helps keep the body healthy