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A sinus is a pouch or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. The term is applied to a large number and variety of structures in the human body, such as a dilated portion of a blood vein, a chronically infected tract such as a fistula, and the air cavities within the cranial bones, especially those located near the nose and connecting to it. These nose-associated sinuses are called paranasal sinuses and are usually what is meant when a person's "sinuses" are referred to.

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Topics: Sinusitis, Sinus Meridiani, Sinus Rhythm...

SinusitisSinusitis is an inflammation, either bacterial, viral or allergic, of the paranasal sinuses. It can be acute (going on less than three weeks) or chronic (going on more than three weeks). Sinusitis is one of the most common complications of the common coldSinusA sinus is a pouch or cavity in any organ or tissue, or an abnormal cavity or passage caused by the destruction of tissue. The term is applied to a large number and variety of structures in the human body, such as a dilated portion of a blood vein, a chroSinus MeridianiSinus Meridiani is a classic albedo feature on Mars stretching east-west just south of that planet's equator. The area was named by the French astronomer Camille Flammarion in the late 1870s when he worked on his compilation and analysis of all prior obse
Sinus rhythmSinus rhythm is indicative of normal electrical conductance of the heart. The electrical impulses from the SA node travel to the AV node with successful contraction of the two atria. The electrical impulses from the AV node successfully contract the ventr  
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