Paranasal Sinus Anatomy

The most posterior of all the paranasal sinuses these are located behind the ethmoid sinuses near the pituitary gland and optic nerves 8. As the paranasal sinuses are continuous with the nasal cavity an upper respiratory tract infection can spread to the sinuses.

Nose Useful Notes On Human Nose And Para Nasal Sinuses

Others are much smaller.

Paranasal sinus anatomy. In the frontal ethmoid and sphenoid of the cranium and the maxillary bones of the face. They have thin walls which are often penetrated by the long roots of the posterior maxillary teeth. Humans possess four paired paranasal sinuses divided into subgroups that are named according to the bones within which the sinuses lie.

What are the paranasal sinuses a formation from. If more than one sinus is affected it is called pansinusitis. The paranasal sinuses of mammals form complex air filled structures and probably exist for a variety of functions including but not exhaustively.

Sphenoid sinus within the sphenoid bones. The largest sinus cavities are about an inch across. Ethmoid air cells sinuses.

Infection of the sinuses causes inflammation particularly pain and swelling of the mucosa and is known as sinusitis. From the nasal mucosa and their continued communication with the nasal fossae. Histology of the nose and paranasal sinuses.

Posterior 13rd is bony 1. Your cheekbones hold your maxillary sinuses the. The superior border of this sinus is the bony orbit the inferior is the maxillary alveolar bone and corresponding tooth roots.

Protection of internal cranial structures maintaining structural strength without a significant increase in weight augmenting vocalisation. The maxillary sinuses the largest of the paranasal sinuses are under the eyes. Paranasal sinuses frontal sinuses.

The maxillary sinuses are the largest of the all the paranasal sinuses. The nasal cavity and all paranasal sinuses are lined by respiratory pseudostratified epithelium except areas of the roof of the cavity most superior part of nasal septum and the medial part of superior turbinate are lined by mucosa that contains receptors for the smell sensation known as olfactory area. External nose it is pyramidal in shape with its root up and the base directed downwards nares external opening of nose choanae open into the nasopharynx 1.

External nose internal nose musculature of nose vascular supply nervous innervation and lymphatic drainage paranasal sinuses 3. The nasal septum separates the left and right maxillary sinuses 9. Where are the paranasal sinuses situated.

The frontal sinuses superior to the eyes in the frontal bone. The sinuses are a connected system of hollow cavities in the skull. Anatomy of the equine paranasal sinuses.

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