Sinus
Sinus means 'cavity', many structures of the human body are thus called sinuses. However, the term
generally refers to the paranasal sinus.
Paranasal Sinus
The sinuses (paranasal sinuses) are air cavities within the facial bones. They are lined by mucous membranes similar to those in other parts of the . The Paranasal sinuses consist of the following :
Ethmoid Sinus
Frontal Sinus
Maxillary Sinus
Sphenoid Sinus
An
of the sinuses is called .
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