How particulate matter enters your body

1.   Particulate matter enters our respiratory (lung) system through the nose and
      throat.
2.   The larger particulate matter is eliminated through coughing, sneezing and
      swallowing.
3.   Smaller particulate matter can penetrate deep into the lungs. It can travel all
      the way to the alveoli, causing lung and heart problems and delivering
      harmful chemicals to the blood system.