[A] Sinuses
[B] Turbinates
[C] Mucus Membrane
[D] Septum
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Answer: The bone around the nose contains hollow, air-filled chambers known as Sinuses.
These sinuses include the frontal, paired maxillary, sphenoid, and ethmoid sinuses, all of which are encompassed by air containing mucosal lined cavities.
The septum, which is composed of bone and cartilage covered by a mucus-producing membrane called the mucosa, divides the nasal cavity into two nostrils.
The lamina of the inferior nasal concha is a thin, vertical, undulating sheet of bone extending medially and inferiorly from the maxillary process.
Additionally, the roof of the nasal cavity is separated from the anterior cranial fossa by a sieve‐like bone known as the cribriform plate of the ethmoid. The sinuses are important for breathing as they help to condition and humidify the air that passes through them.