Nasal Cavity:A large air-filled space above and behind the nose in the middle of the face that warms, moisturizes, and filters air entering the body before it reaches the lungs.
Ethmoid Bone:A sponge-like bone located at the roof of the nose between the two orbits that forms part of the cranial floor and contains numerous air cells or sinuses.
Mucous Membrane: A moist tissue layer lining several organs and body cavities, including the nose, mouth, lungs, and digestive tract, responsible for secretion and absorption