Key Data

Hazardous substances: how they cause ill health

The human body contains five major functional systems which can be detrimentally affected by hazardous substances in the longer term.
There are four ways in which substances can enter the body:
  1. Absorption via the skin.
  2. Ingestion via the stomach.
  3. Inhalation via the lungs.
  4. Injection via cuts or needles which penetrate the skin.
Body system