When we breathe, we do not often think of the complex process that is necessary to keep oxygen flowing through the body. The lungs are crucial to this, as they pass oxygen into the bloodstream and remove carbon dioxide that is then expelled from the body.
While a person can live a normal life with only 30 percent of lung function, there are thousands of people whose lungs have been damaged more significantly, and therefore, need a transplant to survive. Although some of the conditions that result in requiring a lung transplant are hereditary, most are caused or worsened by smoking or environmental pollution.
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