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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
Prepared by Ms Sue Soh
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
Prepared by Ms Sue Soh
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
Prepared by Ms Sue Soh
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
Prepared by Ms Sue Soh
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
Prepared by Ms Sue Soh
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 Prepared by Ms Sue Soh
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 Prepared by Ms Sue Soh
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 Prepared by Ms Sue Soh
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
Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
ASTHMA
Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
PNEUMONIA
Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
CHRONIC BRONCHITIS Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
EMPHYSEMA
Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
SILICOSIS
Prepared by Ms Sue Soh
1.4 : IMPORTANCE OF A HEALTHY RESPIRATORY SYSTEM
Diseases of the Respiratory System
BLACK LUNG LUNG CANCER
Prepared by Ms Sue Soh
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