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(anatomy) any hollow tract in the bones of the face or the skull that is connected to the nasal cavities
What is "sinus"?
The sinus is a hollow space located in the facial bones of the skull. It is lined with a mucous membrane and serves various functions, such as producing mucus, reducing the weight of the skull, and enhancing the resonance of our voice. When the sinus becomes inflamed or congested, it can lead to sinusitis, which is characterized by symptoms like nasal congestion, facial pain, and headaches. Proper sinus health is important for maintaining clear breathing and overall well-being.
a large blood channel without the standard vessel lining
What is a "sinus"?
A sinus refers to a hollow space or cavity within a bone or tissue. Sinuses are typically lined with a mucous membrane and can be found in various locations, such as the skull, nasal passages, and facial bones. They serve several functions, including reducing the weight of the skull, enhancing voice resonance, producing mucus, and helping to regulate air pressure and temperature. Sinuses are prone to inflammation and can contribute to conditions such as sinusitis when their normal drainage becomes blocked.
an abnormal passage leading from a suppurating cavity to the body surface
sinus
