![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Paranasal_sinuses_numbers.svg/640px-Paranasal_sinuses_numbers.svg.png&w=640&q=50)
Skeletal pneumaticity
Presence of air spaces within bones / From Wikipedia, the free encyclopedia
Skeletal pneumaticity is the presence of air spaces within bones. It is generally produced during development by excavation of bone by pneumatic diverticula (air sacs) from an air-filled space, such as the lungs or nasal cavity. Pneumatization is highly variable between individuals, and bones not normally pneumatized can become pneumatized in pathological development.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Paranasal_sinuses_numbers.svg/320px-Paranasal_sinuses_numbers.svg.png)