Science Fair Project Encyclopedia
Sinus
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:-
- The air cavities in the cranial bones, especially those near the nose and connecting to it. These are the paranasal sinuses and are usually what is meant when a person's "sinuses" are referred to.
- A dilated portion of a blood vein, such as inside the braincase.
- A chronically infected tract such as a fistula.
See also
- Sinus is a Latin name for the trigonometric function sine, a concept of mathematics. (See trigonometry.)
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details