Ethmoid air cell

Definition

Ethmoid air cells are a cluster of small air-filled spaces located within the ethmoid bone in the skull, forming part of the paranasal sinuses. They play a role in lightening the skull's weight and warming and humidifying inhaled air.

Related terms

Paranasal Sinuses: Air-filled spaces around the nasal cavity that enhance voice resonance and reduce skull weight.

Ethmoid Bone:

A spongy bone located between the eyes that forms part of the nasal cavity and orbits.

Nasal Cavity:

The large air space behind the nose that is lined with mucosa and filters, warms, and moistens incoming air