air spaces
Gaps between things
Air spaces are gaps or cavities filled with air within a structure or material.
In anatomy, they refer to pockets in the lungs, sinuses, or bones: The infection spread to the air spaces of the middle ear.
In architecture and insulation, air spaces provide thermal barriers.
Botanists use the term for gaps in plant tissue that allow gas exchange.
- bubbleAir-filled film sphere
- sinusesAir-filled skull cavities
- ventilationCirculation of fresh air
- breathing roomSpace for relief
- tree hollowsCavities in trunk wood
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