what is the functional advantage of having air spaces in skull bones?
and…what is a disadvantage to having these spaces lined with mucous membrane?
We have air spaces or sinuses for a number of reasons:
The sinuses act as ‘air-conditioners;’ they filter and humidify the air.
The sinuses lighten the weight of the skull.
The sinuses are ‘crumple zones.’ In severe facial trauma, the facial skeleton is crushed; this absorbs energy that would otherwise be transmitted to the skull and brain. In a similar fashion, cars are designed so that the energy from a crash is absorbed by the car body, but the energy transmitted to the passenger cabin is minimized.
The sinuses are resonance chambers (echo chambers tuned to a specific frequency), which change the way you sound when you speak.
The Rural Alberta Advantage: The Air
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