smoking

• tar effect


  collects in lungs

  stains teeth yellow/brown

  increase risk of lung disease

  contains cancer causing chemicals
• carbon monoxide effect


  irreversibly binds to haemoglobin so stops RBC from carrying as much oxygen

  increases risk of heart disease
• nicotine effect


  addictive

  causes people to smoke more
• hydrogen cyanide 


  kills cilia

  highly poisonous
• oxidising chemicals effect


  highly reactive

  damage heart muscles and blood vessels
• metals effect


  many are carcinogenic eg arsenic, lead
• radioactive compounds effect


  tobacco smoke contains them

  carcinogenic