Sinus Definition Anatomy

The most posterior of all the paranasal sinuses these are located behind the ethmoid sinuses near the pituitary gland and optic nerves 8. A sinus is a sac or cavity in any organ or tissue or an abnormal cavity or passage caused by the destruction of tissue.

Sinus Infection Sinusitis Symptoms Signs Treatment

A narrow elongated tract extending from a focus of suppuration and serving for the discharge of pus.

Sinus definition anatomy. These help to see if allergies are involved in your sinusitis. The sinuses are formed in four right left pairs. A cavity in the substance of a bone of the skull that usually communicates with the nostrils and contains air.

A dilated channel or receptacle containing chiefly venous blood. A depression or cavity formed by a bending or curving. Aortic ss pouchlike dilatations at the root of the aorta one opposite each semilunar cusp of the aortic valve from which the coronary arteries originate.

One of the hollow cavities in the skull connecting with the nasal cavities. Medical definition of sinus. The frontal sinuses are positioned behind the forehead while the maxillary sinuses are behind the cheeks.

We usually just call them sinuses each sinus is lined with soft pink tissue called mucosa. A channel for venous blood. The nasal septum separates the left and right maxillary sinuses 9.

See also carotid sinus syndrome. Anterior ss sinus anteriores the anterior air cells that together with the middle and posterior air cells form the ethmoidal sinus. An air filled cavity in a dense portion of a skull bone.

Sinus synonyms sinus pronunciation sinus translation english dictionary definition of sinus. Carotid sinus a dilatation of the proximal portion of the internal carotid or distal portion of the common carotid artery containing in its wall pressoreceptors that are stimulated by changes in blood pressure. The sinuses decrease the weight of the skull.

Paranasal sinuses is the long technical name. Skin test for allergies. An expanded area in a canal or tube.

Any of various cavities recesses or passages as a hollow in a bone or a reservoir or channel for venous blood. Sphenoid sinus within the sphenoid bones. Your doctor uses a needle or endoscopy to take a mucus sample from inside your sinuses.

In common usage sinus usually refers to the paranasal sinuses which are air cavities in the cranial bones especially those near the nose and connecting to it. Paranasal sinuses is a group of connected hollow sacks of air surrounding our nasal area. Normally the sinuses are empty except for a thin layer of mucus.

Maxillary Sinus Diagram Reading Industrial Wiring Diagrams