Joined to the nasal cavity ethmoid paranasal sinuses. Medical search. Frequent questions

The sinuses are named for the facial bones and sphenoid bone in which they are located. (wikipedia.org)
The frontal sinuses, superior to the eyes, in the frontal bone, which forms the hard part of the forehead. (wikipedia.org)
The ethmoidal sinuses, which are formed from several discrete air cells within the ethmoid bone between the nose and the eyes. (wikipedia.org)
The sphenoidal sinuses, in the sphenoid bone. (wikipedia.org)
Paranasal sinuses form developmentally through excavation of bone by air-filled sacs (pneumatic diverticula) from the nasal cavity. (wikipedia.org)
Coronal CT scan of the paranasal sinuses (Soft Tissue) Coronal CT scan of the paranasal sinuses (Bone) Paranasal sinuses radiograph (occipitofrontal) Paranasal sinuses radiograph (occipitomental) Paranasal sinuses radiograph (lateral) 3D cast of maxillary, frontal, ethmoid and sphenoid sinuses, nasal cavity and hypopharynx. (wikipedia.org)
The medial wall, or nasal septum, is formed (from anteiror to posterior) by (1) the septal cartilage (destroyed in a dried skull), (2) the perpendicular plate of the ethmoid bone, and (3) the vomer (fig. 52-2 B). It is usually deviated to one side. (dartmouth.edu)
the others are portions of the ethmoid bone. (dartmouth.edu)
Ethmoid bone. (healthline.com)
Each bone articulates (joins) with neighboring bones. (biologydictionary.net)
articulate with the maxilla, ethmoid, and frontal bone and with the inferior nasal concha. (biologydictionary.net)
The above facial bone diagram does not include the ethmoid and sphenoid bones. (biologydictionary.net)
4 The maxillary bone houses the nasal cavity, along with the smaller incisive and nasal bones. (vetbloom.com)
Within the rostral nasal cavity are nasal turbinates, which are thin scrolls of bone that make up the dorsal and ventral nasal conchae. (vetbloom.com)
On radiographs, increased soft tissue opacification of the nasal cavities and paranasal sinuses, along with bone lysis of turbinates and paranasal sinuses may be seen in both conditions. (vetbloom.com)
4 In cats, characteristics most seen with neoplasia include unilateral soft tissue opacification of the nasal cavity and paranasal bone lysis with tooth loss. (vetbloom.com)
The skull is a bone protective cavity for the brain. (wikipedia.org)
In the neurocranium these are the occipital bone , two temporal bones , two parietal bones , the sphenoid , ethmoid and frontal bones . (wikipedia.org)
Unites with temporal bone to form zygomatic arch  Nasal bones and cartilages 1. (slideshare.net)
Nasion: midline depression where nasal bones meet frontal bone 3. (slideshare.net)
6 Cranial and facial Bones  Inferior nasal concha: surrounded anteriorly by maxillary bone  Lacrimal bone: visible between maxilla anteriorly and ethmoid posteriorly  Palatine bone 1. (slideshare.net)
7 Cranial and facial Bones  Ethmoid bone 1. (slideshare.net)
Cribriform plate: forms narrow roof of nasal cavity  Sphenoid bone 1. (slideshare.net)
The frontal bone houses the supraorbital foramina, which, along with the frontal sinuses, form 2 important surgical landmarks during approaches involving the anterior skull base. (medscape.com)
The ethmoid bone forms the central part of the floor, which is the deepest area of the anterior cranial fossa. (medscape.com)
The cribriform plate may be more than 1 cm lower than the roof of the ethmoid cavity (fovea ethmoidalis), and it is made of extremely thin bone compared with the relatively thick bone of the lateral fovea ethmoidalis. (medscape.com)
The maxillary sinus is the largest paranasal sinus and lies inferior to the eyes in the maxillary bone. (medscape.com)
The frontal sinus is housed in the frontal bone superior to the eyes in the forehead. (medscape.com)
The sphenoid sinus originates in the sphenoid bone at the center of the head. (medscape.com)
The ethmoid sinuses arise in the ethmoid bone, forming several distinct air cells between the eyes. (medscape.com)
Sinuses have a variety of medical definitions that include cavities or hollow spaces in bone or tissue, dilation or widening in blood vessels, or a fistula or tract that turns into a cavity. (homage.sg)
The cranium has a domelike root - the Calvaria - skullcap - and a floor or cranial base consisting of the ethmoid bone and parts of the occipital and temporal bones. (medmuv.com)

These clinical problems can include secondary sinusitis, the inflammation of the sinuses from another source such as an infection of the adjacent teeth. (wikipedia.org)
Sinusitis simply means inflammation of the sinuses, but this gives little indication of the misery and pain this condition can cause. (rjfraney.com)
The symptoms of inflammation of the sinuses or a chronic sinus infection may include a sinus headache, facial pressure or pain, post-nasal drip, discolored nasal secretions, cough and/or fatigue. (bkallergy.com)

Nasal septum bony formation over the cartilaginous capsule occurs during the eighth week. (medscape.com)
Ectoderm of the nasal sac contacts ectoderm of the mouth roof, thereby forming the oronasal septum. (medscape.com)
Subsequent development of the secondary palate and elongation of primitive nasal chambers results in final definitive nasal chambers, separated by the nasal septum. (medscape.com)
The nasal septum begins development at week 5 and forms from the frontonasal process, which grows in an anterior-to-posterior direction, eventually joining with the tectoseptal expansion, a median ridge of mesenchyme. (medscape.com)
The nasal septum subsequently undergoes chondrification and ossification of its various constituents. (medscape.com)
The two inferior openings are the nostrils (or nares), bounded laterally by the ala and medially by the nasal septum. (dartmouth.edu)
The nasal cavity is divided into right and left halves (each of which may be termed a nasal cavity) by the nasal septum. (dartmouth.edu)
The common nasal meatus is what communicates with all three of the other meati, with its medial margin being the nasal septum and may be curved in the cat. (vetbloom.com)
Perpendicular plate: forms upper portion of bony nasal septum 3. (slideshare.net)
Lower portion of bony nasal septum 2. (slideshare.net)

Humans possess four pairs of paranasal sinuses, divided into subgroups that are named according to the bones within which the sinuses lie. (wikipedia.org)
They are all innervated by branches of the trigeminal nerve (CN V). The maxillary sinuses, the largest of the paranasal sinuses, are under the eyes, in the maxillary bones (open in the back of the semilunar hiatus of the nose). (wikipedia.org)
The bones occupied by sinuses are quite variable in these other species. (wikipedia.org)
The continuous free margin of the nasal bones and maxillae in a dried skull is termed the piriform aperture. (dartmouth.edu)
The roof of the nasal cavity is formed by nasal cartilages and several bones, chiefly the nasal and frontal bones, the cribriform plate of the ethmoid (fig. 52-1 ), and the body of the sphenoid. (dartmouth.edu)
The lateral wall is uneven and complicated and is formed by several bones: nasal, maxilla, lacrimal and ethmoid, inferior nasal concha, perpendicular plate of palatine, and medial pterygoid plate of sphenoid (fig. 52-2 A). The lateral wall presents three or four medial projections termed nasal conchae, which overlie passages (meatuses). (dartmouth.edu)
Several bones that help form the walls of the nasal cavity have air-containing spaces called the paranasal sinuses, which serve to warm and humidify incoming air. (usk.ac.id)
They're irregularly shaped, allowing them to tightly join all the uniquely shaped cranial bones. (healthline.com)
The ethmoid and sphenoid bones are also part of the neurocranium. (biologydictionary.net)
articulate with the frontal, ethmoid, and maxilla bones, as well as with each other. (biologydictionary.net)
articulate with the highest number of other bones: the frontal, ethmoid, nasal, zygomatic, lacrimal, palatine, and vomer bones and with the inferior nasal concha and each other. (biologydictionary.net)
Firstly, the facial bones protect the soft tissues that lie underneath, such as the mucous membranes and sensory cells of the nasal cavity, the oral cavity, the eyes, and - if the ethmoid is included - the pituitary gland of the brain. (biologydictionary.net)
These cavities, located within the skull or bones of the head surrounding the nose, include the frontal sinuses over the eyes in the brow area, the maxillary sinuses inside each cheekbone, the ethmoids just behind the bridge of the nose and between the eyes, and behind them, the sphenoids in the upper region of the nose and behind the eyes. (rjfraney.com)
The human skull fully develops two years after birth.The junctions of the skull bones are joined by structures called sutures . (wikipedia.org)
The skull is made up of a number of fused flat bones , and contains many foramina , fossae , processes , and several cavities or sinuses . (wikipedia.org)
Except for the mandible , all of the bones of the skull are joined by sutures - synarthrodial (immovable) joints formed by bony ossification , with Sharpey's fibres permitting some flexibility. (wikipedia.org)
The bones of the facial skeleton (14) are the vomer , two inferior nasal conchae , two nasal bones , two maxilla , the mandible , two palatine bones , two zygomatic bones , and two lacrimal bones . (wikipedia.org)
There are 4 paired sinuses in the cranial bones. (bkallergy.com)
The 5 bones that make up the skull base are the ethmoid, sphenoid, occipital, paired frontal, and paired temporal bones. (medscape.com)
The paranasal sinuses are air-filled spaces located within the bones of the skull and face. (medscape.com)
The thickness of the walls of the sphenoid sinus is variable, with the anterosuperior wall and the roof of the sphenoid sinus (the planum sphenoidale) being the thinnest bones. (medscape.com)
The facial skeleton consists of the bones surrounding the mouth and nose and contributing to the orbits (eye sockets, orbital cavities). (medmuv.com)

The nasal cavity is related to the anterior and middle cranial fossae, orbit, and paranasal sinuses and is separated from the oral cavity by the hard palate. (dartmouth.edu)
The salivary glands are exocrine glands positioned in and around the oral cavity. (lecturio.com)
There are also hundreds of minor salivary glands found in patches around the oral cavity. (lecturio.com)

If this happens, normal drainage of mucus within the sinuses is disrupted, and sinusitis may occur. (wikipedia.org)
After listening to your history of symptoms and perhaps doing a sinus X-ray, the doctor says you have sinusitis. (rjfraney.com)
Sinusitis has its own localized pain signals, depending upon the particular sinus affected. (rjfraney.com)
Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and runny nose or nasal congestion. (rjfraney.com)
Viruses can enter the body through the nasal passages and set off a chain reaction resulting in sinusitis. (rjfraney.com)
Medicines, too, can set off a nasal reaction with accompanying sinusitis. (rjfraney.com)
For example, intolerance to aspirin and other related non-steroidal anti-inflammatory medications, such as ibuprofen, can be associated with sinusitis in patients with asthma or nasal polyps (small growths on the mucous membrane lining of the sinuses). (rjfraney.com)
The term "chronic sinusitis" is defined as an inflammation of the sinus or sinuses lasting more than 12 weeks in duration. (bkallergy.com)
In order to understand chronic sinusitis, it is important to know the anatomy of a sinus. (bkallergy.com)
It is often used in conjunction with other treatments such as nasal corticosteroids and oral antibiotics to treat chronic sinusitis. (bkallergy.com)
Dupixent (dupilumab)] are being used more often to treat chronic sinusitis with nasal polyps. (bkallergy.com)
As its name suggests, sinusitis , or sinus infection happens when your sinuses are inflamed, often due to an infection, explaining its synonymous association with sinus infection. (homage.sg)
Acute sinusitis refers to when your sinus infection is characterised by a sudden onset, a duration of less than 4 weeks and with complete resolution. (homage.sg)
Chronic sinusitis refers to when your sinus infection symptoms persist for 12 weeks or even longer. (homage.sg)
Ethmoid sinusitis refers to when your ethmoid sinuses, located on either side of your nose bridge immediately adjacent to your eyes, are inflammed. (homage.sg)
Maxillary sinusitis refers to when your maxillary sinuses, located on either side of your nose, below your eyes, are inflamed. (homage.sg)
Frontal sinusitis refers to when your frontal sinuses, located immediately above your nose and eyebrows, are inflamed. (homage.sg)
Sphenoidal sinusitis refers to when your sphenoidal sinuses, located on the front of your nose bridge, next to the ethmoid sinuses, are inflamed. (homage.sg)

Innervation of the sphenoid sinus comes from branches of the first and second divisions of the trigeminal nerve. (medscape.com)

3 The nostrils are rostral openings to the nasal cavity, extending caudally to the cribriform plate and nasopharynx. (vetbloom.com)
The caudal nasal cavity houses the ethmoid turbinates that attach to the cribriform plate. (vetbloom.com)
The fovea ethmoidalis, or the roof of the ethmoid cavity, continues laterally from the cribriform plate. (medscape.com)

The roof of the maxillary sinus is the floor of the orbit. (medscape.com)
Endoscopic transnasal removal of bullet and foreign body from the paranasal sinuses and orbit has been reported in the literature. (surgicalneurologyint.com)
Prygopalatine fossa communicates with internal cranial base through foramen rotundum , with orbit thruogh inferior orbital fissura , with mouth cavity through greater and lesser palatine canals, with external cranial base (foramen lacerum ) through pterygoid canal. (medmuv.com)
This fossa communicates with the orbit by the inferior orbital fissure, with the nasal cavity by the sphenopalatine foramen, and with the infratemporal fossa by the pterygomaxillary fissure. (medmuv.com)

Paranasal sinuses are a group of four paired air-filled spaces that surround the nasal cavity. (wikipedia.org)
During the fifth week of gestation, medial and lateral swellings form from the mesodermal layer and surround the nasal placode, which continues to invaginate as the olfactory pit. (medscape.com)

The middle of the external nose develops from caudal progression of the medial nasal folds, which fuse to form the frontonasal process. (medscape.com)
Gk, rhis, rhinos) includes the external nose on the face and the nasal cavity, which extends posteriorly from it. (dartmouth.edu)
Each sinus has an opening into the nose for the free exchange of air and mucus, and each is joined with the nasal passages by a continuous mucous membrane lining. (rjfraney.com)
Therefore, anything that causes a swelling in the nose-an infection or an allergic reaction-also can affect the sinuses. (rjfraney.com)
Ethmoid inflammation also can cause tenderness when the sides of the nose are touched, a loss of smell, and a stuffy nose. (rjfraney.com)
For example, the nose reacts to an invasion by viruses that cause infections such as the common cold, flu, or measles by producing mucus and sending white blood cells to the lining of the nose, which congest and swell the nasal passages. (rjfraney.com)
The bacteria that may have been living harmlessly in the nose, throat, or sinus area can multiply and cause an acute sinus infection. (rjfraney.com)
The ethmoid sinuses are situated between the eyes on each side of the upper nose. (bkallergy.com)
The sphenoid sinuses are positioned behind the eyes and bridge of the nose and lie in the deeper areas of the cranium. (bkallergy.com)
These are air-filled pockets or hollow spaces in your face that are found near your nose and connect to your nasal cavity. (homage.sg)

As the nasal cavity heightens, ectodermal folds appear in the ethmoid region and give rise to superior, middle, and inferior concha. (medscape.com)

The skull also contains sinuses , air-filled cavities known as paranasal sinuses , and numerous foramina . (wikipedia.org)
Their known functions are the lessening of the weight of the skull, the aiding of resonance to the voice and the warming and moistening of the air drawn into the nasal cavity . (wikipedia.org)
A sinus is a cavity in any organ or tissue, but in reference to allergies, it is a cavity in the skull and often referred to a "paranasal sinuses. (bkallergy.com)
The skull base forms the floor of the cranial cavity and separates the brain from other facial structures. (medscape.com)
The anterior limit of the anterior skull base is the posterior wall of the frontal sinus. (medscape.com)
Behind the posteromedial wall of the maxillary sinus lies the pterygopalatine fossa, a small inverted space that houses several important neurovascular structures and communicates with several skull base foramina. (medscape.com)
Small-caliber low velocity bullets may intersect skull base, causing significant damage to the brain and a communication between endocranium and paranasal sinuses. (surgicalneurologyint.com)

Greater and lesser palatine foramina (for palatine nerves and arteries) and posterior nasal spine Vomer 1. (slideshare.net)

Sinuses are hollow air spaces, of which there are many in the human body. (rjfraney.com)
When people say, "I'm having a sinus attack," they usually are referring to symptoms in one or more of four pairs of cavities, or spaces, known as paranasal sinuses. (rjfraney.com)

the ethmoidal sinuses are between the eyes and the sphenoidal sinuses are behind the eyes. (wikipedia.org)
The spheno-ethmoidal recess, above and posterior to the superior concha, receives the opening of the sphenoidal sinus. (dartmouth.edu)

The anterior clinoid processes and the planum sphenoidale, which forms the roof of the sphenoid sinus, mark the posterior limit. (medscape.com)
The anterior maxillary sinus wall houses the infraorbital nerve, which runs through the infraorbital canal along the roof of the sinus and sends branches to the soft tissues of the cheek. (medscape.com)
the bullet was localized in the right frontal lobe and its tip was in contact with the ethmoid roof. (surgicalneurologyint.com)

Attenuation of this structure leads to creation of the oronasal membrane separating the nasal cavity from the pharynx. (medscape.com)
The nasal cavity can be examined in vivo either through a nostril or through the pharynx. (dartmouth.edu)

They are centered on the nasal cavity and have various functions, including lightening the weight of the head, humidifying and heating inhaled air, increasing the resonance of speech, and serving as a crumple zone to protect vital structures in the event of facial trauma. (medscape.com)

The maxillary sinus is supplied by branches of the internal maxillary artery, which include the infraorbital, alveolar, greater palatine, and sphenopalatine arteries. (medscape.com)
The sphenoid sinus is supplied by the sphenopalatine artery, except for the planum sphenoidale, which is supplied by the posterior ethmoidal artery. (medscape.com)

The nasal placode, which arises from surface ectoderm, develops on the lateral aspects of the frontal prominence. (medscape.com)
The depression separating the maxillary swelling from the lateral nasal prominences is known as the nasolacrimal groove, which eventually gives rise to the nasolacrimal apparatus. (medscape.com)
Three paired centers of chondrification form the lateral nasal cartilages. (medscape.com)
Beginning at 6.5 weeks, lateral nasal wall development occurs. (medscape.com)
Perpendicular plate: forms posterior part of lateral wall of nasal cavity 2. (slideshare.net)
superior and middle nasal conchae project inferomedially from lateral wall 2. (slideshare.net)

4 The nasal turbinates obstruct airflow, while the nasal passages are what allow airflow. (vetbloom.com)
There are four nasal passages, which are the dorsal, middle, ventral and common meatus. (vetbloom.com)
It should be noted that some individuals do not like saline irrigation as it may cause some discomfort in the nasal or sinus passages. (bkallergy.com)

There are four pairs: frontal, sphenoid, maxillary and ethmoid. (easyauscultation.com)
There are 4 pairs of paranasal sinuses located in your face, of which any of them could be infected. (homage.sg)

The nasal cavity extends in an antero-posterior direction from the nostrils, or nares, to the choanae. (dartmouth.edu)
In addition to the nostrils and choanae, the nasal cavity presents openings for the paranasal sinuses and the nasolacrimal duct. (dartmouth.edu)
The maxillary sinuses are located on either side of the nostrils in the cheekbone areas. (bkallergy.com)

When this swelling involves the adjacent mucous membranes of the sinuses, air and mucus are trapped behind the narrowed openings of the sinuses. (rjfraney.com)
If the sinus openings become too narrow to permit drainage of the mucus, then bacteria, which normally are present in the respiratory tract, begin to multiply. (rjfraney.com)

Because the maxillary posterior teeth are close to the maxillary sinus, this can also cause clinical problems if any disease processes are present, such as an infection in any of these teeth. (wikipedia.org)
Infection in the maxillary sinuses can cause the upper jaw and teeth to ache and the cheeks to become tender to the touch. (rjfraney.com)
Although the sphenoid sinuses are less frequently affected, infection in this area can cause earaches, neck pain, and deep aching at the top of the head. (rjfraney.com)
Most apparently healthy people harbor bacteria, such as Streptococcus pneumoniae and Haemophilus influenzae, in their upper respiratory tracts with no ill effects until the body's defenses are weakened or drainage from the sinuses is blocked by a cold or other viral infection. (rjfraney.com)
There is often a history of onset of the infection as well as a progression of specific symptoms which may help diagnose the sinus infection. (bkallergy.com)
Most of us would be familiar with the common classic symptoms of sinus infection. (homage.sg)
In other words, major symptoms are more indicative of a sinus infection, and minor symptoms help to further confirm the diagnosis, or narrow down the cause of your sinus infection. (homage.sg)

The shape of the sinus is a pyramid, with the base along the nasal wall and the apex pointing laterally toward the zygoma. (medscape.com)

Posteriorly, the nasal cavity communicates with the nasopharynx, which in many respects may be regarded as the posterior portion of the cavity. (dartmouth.edu)
The posterior wall is thin and adjacent to the superior sagittal sinus and frontal lobe dura. (medscape.com)
The posterior wall of the frontal sinus, which separates the sinus from the anterior cranial fossa, is much thinner than its anterior wall. (medscape.com)

Anterior nares form by the recession of nasal pits into the paraxial mesoderm. (medscape.com)
Most anterior ethmoidal cells open on an elevation (ethmoidal bulla, fig. 52-3 B). A curved slit (hiatus semilunaris) inferior to the bulla receives the opening of the maxillary sinus. (dartmouth.edu)
The frontal sinus and some anterior ethmoidal cells open either into an extension (ethmoidal infundibulum) of the hiatus or directly into the anterior part (frontal recess) of the middle meatus. (dartmouth.edu)
A nasal speculum in a nostril is used in anterior rhinoscopy. (dartmouth.edu)
Anterior nasal cartilages are palpable  Maxilla 1. (slideshare.net)
The most important anatomic structures below the anterior cranial fossa are the orbits and the paranasal sinuses. (medscape.com)
Sinuses, anterior and sectioned views. (medscape.com)
The thinnest portion of the anterior wall is above the canine tooth, called the canine fossa, which is an ideal entry site for addressing various disease processes of the maxillary sinus. (medscape.com)
It is formed by the upward movement of anterior ethmoid cells after the age of 2. (medscape.com)

In the feline, the ethmoid turbinates are well developed and invade the lower part of the frontal sinuses. (vetbloom.com)

Sinuses are lined with a mucosa. (usk.ac.id)

Oral corticosteroids reduce inflammation and are particularly useful for shrinking nasal polyps, though they also may result in the multisystem improvement of symptoms. (bkallergy.com)
Nasal polyps (i.e., nasal polyposis) are soft, benign growths that develop from the lining of the sinuses and nasal cavity. (bkallergy.com)
Approximately 4-5% of the general population has nasal polyps. (bkallergy.com)
Nasal polyps cause increased nasal congestion and may block the normal drainage pattern of the sinuses. (bkallergy.com)

The middle meatus, under cover of the middle concha, receives the openings of the maxillary and frontal sinuses. (dartmouth.edu)

The paranasal sinuses are lined with respiratory epithelium (ciliated pseudostratified columnar epithelium). (wikipedia.org)
It is convenient to divide the nasal cavity into a vestibule, a respiratory region, and an olfactory region. (dartmouth.edu)

The natural ostium of the maxillary sinus is located in the superior portion of the medial wall. (medscape.com)

The results of experimental studies suggest that the natural ventilation rate of a sinus with a single sinus ostium (opening) is extremely slow. (wikipedia.org)
The sphenoid sinus ostium is located on the anterosuperior surface of the sphenoid face, usually medial to the superior turbinate. (medscape.com)

medical citation needed] Malignancies of the paranasal sinuses comprise approximately 0.2% of all malignancies. (wikipedia.org)
In cats, nasal neoplasia and chronic sinorhinopathies account for approximately 70% of chronic nasal disease. (vetbloom.com)

The frontal sinus is supplied by the supraorbital and supratrochlear arteries of the ophthalmic artery. (medscape.com)
Before reaching the supraorbital notch it has a branch which joins with the supratrochlear vein to form the angular vein 2 . (radiopaedia.org)
Once it has traversed the supraorbital notch, the supraorbital vein joins to help form the superior ophthalmic vein 3 . (radiopaedia.org)

The paranasal sinuses are joined to the nasal cavity via small orifices called ostia. (wikipedia.org)
[ 3 ] The frontal sinuses are funnel-shaped structures with their ostia located in the most dependent portion of the cavities. (medscape.com)

Anatomy23

Organisms1

Diseases36

Chemicals and Drugs2

Analytical, Diagnostic and Therapeutic Techniques and Equipment10

Phenomena and Processes1

Disciplines and Occupations1

Technology, Industry, Agriculture1

Information Science1

Health Care2

Bone32

Inflammation of the sinuses3

Septum10

Bones22

Oral cavity3

Sinusitis18

Trigeminal nerve1

Cribriform3

Orbit4

Surround the nasal2

Nose10

Inferior concha1

Skull7

Vomer1

Spaces2

Sphenoidal2

Roof3

Pharynx2

Facial1

Sphenopalatine2

Lateral6

Passages3

Pairs2

Nostrils3

Mucus2

Infection7

Laterally1

Posterior3

Anterior9

Turbinates1

Mucosa1

Polyps4

Openings1

Respiratory2

Medial wall1

Ostium2

Approximately2

Supraorbital3

Ostia2