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1651408
Lung Disease
Description
A Level Biology Mind Map on Lung Disease, created by Olivia Farrow on 16/11/2014.
No tags specified
lungs
disease
biology
a level
athsma
fibrosis
revision
as
allergies
lung
lung disease
biology
a level
Mind Map by
Olivia Farrow
, updated more than 1 year ago
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Created by
Olivia Farrow
almost 10 years ago
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Resource summary
Lung Disease
Pulmonary Fibrosis
Scar tissue forms on the epithelium of the lungs, become irreversibly thickened.
Therefore, diffusion pathway is increased, oxygen cannot diffuse as efficiently.
Reduces elasticity of the lung.
Makes it difficult to breathe, therefore ventilate the lungs
Shortness of breath
Chronic dry cough- Bodies reaction to the obstruction of the fibrous tissue
Pain and discomfort in chest
Weakness and fatigue
Asthma
Localised allergic reaction
Air pollutants/exercise/infecction causes white blood cells on the linings of the bronchi to release histamine
Linings of airways becomes inflamed
Cells on epithelial lining secrete large quantities of mucus.
Fluid leaves capillaries and enters the airways
Muscles surrounding the bronchioles contracts, constricting airways
Overall, much greater resistance to the flow of air in and out.
Difficult to ventilate and therefore maintain the diffusion gradient across the exchange surface.
Wheezing sound when breathing.
Tight feeling in chest
Coughing in response to obstructed bronchi
Emphysema
Elastin in lungs has become permanently stretched
Lungs are no longer able to force out all the air from the alveoli.
Surface area of the alveoli is reduced and sometimes bursts.
Little, if any, exchange of gases can take place across the damaged and stretched air sacs.
Shortness of breath, difficulty inhaling air
Chronic cough, body tries to remove damaged tissue and mucus
Bluish skin coloration, low levels of oxygen
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Lung_disease_photo (image/png)
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