They are lined with mucus membrane, which secretes fluid that moistens and protects the areas it covers.
Structure [edit]. Frontal sinuses are rarely symmetrical and the septum between them frequently deviates to one or other side of the middle line. Their average measurements are as follows: height 28 mm, breadth 24 mm, depth 20 mm, creating a space of 6-7 ml. Infection of the frontal sinus causing sinusitis can give rise to serious complications, as it is in close proximity to the orbit and cranial cavity (orbital cellulitis, epidural and subdural abscess, meningitis). Frontal Sinus: Normal Anatomy & Variants. The frontal sinuses can have variable drainage depending on the anatomy of the frontal sinus drainage pathway (FSDP). The frontal sinuses have a superior and inferior compartment of the FSDP. The frontal sinus ostium drains into the superior compartment which then communicates directly with the inferior compartment.  The frontal sinus are situated behind the brow ridges. Sinuses are mucosa-lined airspaces within the bones of the face and skull. Each opens into the anterior part of the corresponding middle nasal meatus of the nose through the frontonasal duct which traverses the anterior part of the labyrinth of the ethmoid. Infection of the frontal sinus causing sinusitis can give rise to serious complications, as it is in close proximity to the orbit and cranial cavity (orbital cellulitis, epidural and subdural abscess, meningitis). When looking at a CT of the sinuses, they should appear black meaning they're devoid of any materials. Opacification of your right frontal sinus means the sinus cavity just ab … ove your right eye is showing opaque in a CT scan which normally is a sign of inflammation or infection. Polyps and tumors will also show up opacified in the scan. If you're concerned, I would pay a visit to your local ENT. frontal sinus, one of a pair of small cavities in the frontal bone of the skull that communicate with the nasal cavity and lie above the orbits. The frontal sinuses are situated behind the superciliary arches and are lined with a mucous membrane that is continuous with that of the nasal cavity. frontal sinus one of the paired paranasal sinuses in the frontal bone, each communicating with the middle nasal meatus on the same side. intercavernous s's channels connecting the two cavernous sinuses, one passing anterior and the other posterior to the stalk of the pituitary gland. 1 The frontal sinuses, superior to the eyes, in the frontal bone, which forms the hard part of the forehead. 2  The ethmoidal sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes. 3  The sphenoidal sinuses, in the sphenoid bone.  Frontal sinus. The frontal sinuses are pockets of space located above the orbit of each eye in the frontal bone. They are lined with mucus membrane, which secretes fluid that moistens and protects the areas it covers. The size and shape of the frontal sinus can vary from person to person. These spaces fill up with mucus, which then drain into the nose. The draining process can be hindered by blockages. If mucus accumulates, this can cause infections The frontal sinus is housed in the frontal bone superior to the eyes in the forehead. It is formed by the upward movement of anterior ethmoid cells after the age of 2. Growth of this sinus increases at the age of 6 and continues until the late teenage years.  Nasal polyps can also cause sinusitis in the frontal sinus. Nasal polyps are caused by recurring inflammation of the sinuses, such as that resulting from asthma or allergies. They resemble small non-cancerous sacs, and are found in the sinuses or nasal passageways. They are lined with mucus membrane, which secretes fluid that moistens and protects the areas it covers. The size and shape of the frontal sinus can vary from person to person. These spaces fill up with mucus, which then drain into the nose.
https://en.wikipedia.org/wiki/Frontal_sinus http://www.uwmsk.org/sinusanatomy2/Frontal-Normal.html https://en.wikipedia.org/wiki/Frontal_sinus http://www.answers.com/Q/What_does_the_frontal_sinus_do http://medical-dictionary.thefreedictionary.com/frontal+sinus https://en.wikipedia.org/wiki/Paranasal_sinuses http://www.healthline.com/human-body-maps/frontal-sinus http://emedicine.medscape.com/article/1899145-overview http://www.healthline.com/human-body-maps/frontal-sinus
what does the frontal sinus do