Structure of the lungs

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  • Created by: emily_w
  • Created on: 18-11-14 12:51
What is the function of smooth muscle?
To contract to reduce airflow to the alvioli.
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What is the function of elastic fibres?
They return the airway to its original shape after the smooth muscle has contracted.
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Where is the cartilage located?
In the trachea
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What can cause the constriction of the smooth muscle?
Asthma or an allergic reaction
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Why does the cartilage have to be c-shaped?
You can move your neck without constricting airways; the oesphagus can expand.
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How do the elastic fibres work?
They recoil
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When could the contraction of the smooth muscle be useful?
If there is a fire/smoke
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What is the function of the cartilage?
Stops trachea and bronchi collapsing due to low pressure during exhalation.
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Where are goblet cells found?
In the trachea and bronchi
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What is the function of goblet cells?
They secrete mucus to trap pollen and other harmful particles, which can then be transported out of the body
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What are ciliated epithelium?
Cells in the trachea with a hair-like structure.
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How do the ciliated epithelium move mucus?
They waft in synchronisation
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What is the function of ciliated epithelium?
They force mucus upwards so it can be swallowed and the bacteria killed in the stomach.
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How are ciliated epithelia adapted for their function?
They have a lot of mitochondria to provide energy for movement.
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How are ciliated epithelia damaged?
By smoking or repeated vomiting (eg bulimia) because they are very fragile
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Other cards in this set

Card 2

Front

What is the function of elastic fibres?

Back

They return the airway to its original shape after the smooth muscle has contracted.

Card 3

Front

Where is the cartilage located?

Back

Preview of the front of card 3

Card 4

Front

What can cause the constriction of the smooth muscle?

Back

Preview of the front of card 4

Card 5

Front

Why does the cartilage have to be c-shaped?

Back

Preview of the front of card 5
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