cancer

• Health


  The state of physical and mental well-being
• Factors work together and affect physical and mental health
• Disease


  A disorder that affects an organism's body, organs, tissues or cells
• Cancer


  A disease caused by normal cells changing so that they grow and divide in an uncontrolled way. The uncontrolled growth causes a lump called a tumour to form.
• Tumour


  The lump of cells formed as a result of uncontrolled cell division
• Types of tumour


  • Benign
  • Malignant
• Benign tumour


  • Grows slowly; usually grow within a membrane, so can easily be removed; does not invade other parts of the body
• Malignant tumour


  • Grows quickly; invades neighbouring tissues and can spread to other parts of the body in the bloodstream; as the tumour grows, cancer cells detach and can form secondary tumours in other parts of the body - this is called metastasis
• Carcinogen


  A chemical or other agent that causes cancer
• DNA


  Deoxyribonucleic acid. The material inside the nucleus of cells, carrying the genetic information of a living being
• Mutation


  A random and spontaneous change in the structure of a gene, chromosome or number of chromosomes
• Risk factor

  Something that increases the likelihood of developing a disease
• Risk factors for cancer

  • Lifestyle factors (viruses, cigarette smoke, alcohol, UV radiation)
  • Industrial and environmental factors (ionising radiation, chemical carcinogens)
  • Genetic factors. • diet including fat, salt intake
• Ultraviolet radiation


  A high energy part of the electromagnetic spectrum associated with sunburn and skin cancer
• Ionising radiation


  Radiation that is able to remove electrons from atoms or molecules to produce positively charged particles called ions
• what type of cells fo chemotherpay target 


  cells that go through the cell cyle too quickly which is why hair foliciles die