cancer

• what is cancer?


  an uncontrollable mass of cells.
• what is a tumour?


  when the cells divide uncontrollably, they form a mass of cells called a tumour.
• benign tumours.


  • benign tumours are an uncontrolled growth of cells that cannot invade other tissue.
  • can easily be removed and not invade other tissues.
  • they grow slowly
• malignant tumours.


  • malignant tumours are an uncontrolled growth of cells which can invade other tissue and cause secondary tumours.
  • they grow quickly
  • more dangerous
• recall two types of tumours

  malignant

  benign
• environmental factors risk factor for developing cancer.


  • smoking
  • alcohol consumption
  • exposure to UV