SMOKING WHY DO IT

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SMOKINGWHY DO IT?
Amputated fingers caused by poor blood supply due
to smoking
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SMOKING AFFECTS THE RESPIRATORY SYSTEM

• Many of the air passages in the breathing system
  are lined with tiny hairs called cilia.
• Tobacco smoke paralyses these cilia.
• Cilia keep the airways clear and free from dust
  bacteria

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• If the cilia cannot work or are damaged the
  bronchial tubes become clogged up with mucus
  dirt.
• Blocked bronchial tubes make breathing
  difficult.
• Blocked bronchial tubes are more likely to become
  infected
• The phlegm becomes green and smelly

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Cells lining the bronchus- here there are no
cilia- they have been damaged by the nicotine
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EMPHYSEMA
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• Emphysema means full of air
• Coughing due to dirt phlegm in the breathing
  system splits the tiny delicate air sacs in the
  lungs
• This reduces the the surface area for gas
  exchange so makes breathing harder
• The air sacs also lose their elasticity and so
  cannot get rid of the air so easily
• A person with emphysema has to really work hard
  to breath out
• Their lungs are always full of air
• The size of their chest cage increases so they
  have a huge barrel shaped chest.

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Lung tissue blackened by smoke and showing large
spaces due to emphysema.
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Emphysema- these large spaces are due to the
breakdown of the air sacs in the lungs
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• The centre of the lung on the previous slide has
  damaged air sacs.
• There are huge spaces.
• There are also black spots from the smoke
• This lung damage which causes emphysema is
  irreversible
• It makes breathing very difficult.
• If you cant breath what else can you do? not a
  lot!