ANATOMY

Detailed explanation-1: -The paranasal sinuses are four paired, hollow areas within the frontal bone, maxillary bones, ethmoid bone, and sphenoid bone. Sinuses are sometimes referred to as air cavities. The four paranasal sinuses surround the nasal cavity and are lined with epithelium and mucus-producing cells.

Detailed explanation-2: -What are sinuses? The sinuses are cavities, or air-filled pockets, near the nasal passage. As in the nasal passage, the sinuses are lined with mucous membranes. There are four different types of sinuses: Ethmoid sinus.

Detailed explanation-3: -Paranasal sinuses are air-filled cavities in the frontal, maxilae, ethmoid, and sphenoid bones. These sinuses, which have the same names as the bones in which they are located, surround the nasal cavity and open into it.

Detailed explanation-4: -The Paranasal Sinuses Surround the Nasal Cavities Mucosae line the paranasal sinuses and help to warm and humidify the air we inhale.

Detailed explanation-5: -Turbinates (conchae): There are three pairs of turbinates located along the sides of both nasal cavities. These folds inside your nose help warm and moisten air after you breathe it in and help with nasal drainage.