air cavities

Air cavities are hollow spaces within the body or objects that contain air. In the human body, examples include the sinuses—air-filled chambers in the skull that help with voice resonance, insulation, and reducing weight. These cavities are lined with mucous membranes and connected to the nasal passages. They can also refer to empty spaces in other contexts, such as dental cavities or cavities in materials. Overall, air cavities serve various functions like cushioning, temperature regulation, and reducing weight, and their presence or infection can influence health and material integrity.