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1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful substances to the Respiratory System SULPHUR DIOXIDE • Is released when fossil fuels are burnt in factories • A poisonous acidic gas • Dissolves in rain to form acid rain • Corrodes the respiratory system as it is corrosive • Causes asthma and bronchitis 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful substances to the Respiratory System CARBON MONOXIDE • A very poisonous gas • Is produced out when fossil fuels are incompletely burnt • Combines with haemoglobin to form carboxyhaemoglobin • Reduces oxygen intake and causes death of carbon monoxide poisoning 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful substances to the Respiratory System CARBON DIOXIDE • Produced from the burning of fossil fuels • Traps heat (sun) in the atmosphere and causes global warming • Causes severe headache 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful substances to the Respiratory System DUST •Irritates the respiratory system •Blocks the bronchioles & causes lung diseases •Attracts bacteria – tuberculosis bacteria 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful substances to the Respiratory System SMOG • Dust + mist = smog • Reduces visibility • Causes asthma and bronchitis especially among the elderly people 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful chemicals in Cigarettes NICOTINE •Poisonous chemicals in cigarettes •Highly addictive •Hardens the blood vessels – blood cannot flow through them easily – causes high blood pressure •Causes lung cancer 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful Chemicals in Cigarettes TAR •Thick black substance – sticks to the walls of respiratory system •Corrodes the lung cells – lungs are less elastic & unable to function properly •Prevents dust particles & bacteria from being cleared from the lungs – leads to infection 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful chemicals in Cigarettes CARBON MONOXIDE • Decreases the oxygen intake as it tends to combine better with haemogolbin compare to oxygen • Causes a loss of 10% of oxygen intake 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Harmful Chemicals in Cigarettes CARCINOGENS • Chemicals which causes cancer • Cigarette smoke contains carcinogens such as benzopyrene • Causes mouth cancer, lung cancer & throat cancer 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System ASTHMA 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System PNEUMONIA 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System CHRONIC BRONCHITIS 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System EMPHYSEMA 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System SILICOSIS 1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM Diseases of the Respiratory System BLACK LUNG LUNG CANCER