Cancer

• • a tumour is formed when there is uncontrolled cell divisions
  • they divide rapidly with little to no non-dividing time in between
  • communicable diseases that can cause tumours:
  • HPV
  • agrobacterium tumefacien
• Benign tumours

  • growths of abnormal cells in one contained place
  • don't invade other places
  • grow huge, fast
• Malignant tumours

  • invade the body and invade neighbouring healthy tissues
  • represented as cancer
  • initial tumour can split up - release small clumps of cells into bloodstream or lymphatic system
• MELANOMAS

  • malignant tumours often triggered by exposure to a lot of UV radiation
  • type of skin cancer that can spread
• IONISING RADIATION AND CANCER

  • radiation from radioactive material penetrates cell and damages chromosomes, causing DNA mutations
  • this effect more often increases risk of cancer development