Sinus (anatomy)

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Sinus (anatomy)

Sinus is Latin

Latin

Latin is an Italic language, historically spoken in Latium and Ancient Rome. Through the Military history of the Roman Empire, Latin spread throughout the Mediterranean and a large part of Europe....
for "bay", "pocket", "curve", or "bosom". In anatomy

Anatomy

Anatomy is a branch of biology that is the consideration of the body plan. It is a general term that includes human anatomy, animal anatomy and plant anatomy ....
, the term is used in various contexts.

A sinus is a sack or cavity in any organ

Organ (anatomy)

In biology, an organ is a biological tissue that performs a specific function or group of functions. Usually there is a main tissue and sporadic tissues....
or tissue

Biological tissue

Tissue is a cellular organizational level intermediate between cells and a complete organism. Hence, a tissue is an ensemble of cells, not necessarily identical, but from the same origin, that together carry out a specific function....
, or an abnormal cavity or passage caused by the destruction of tissue. In common usage, "sinus" usually refers to the paranasal sinus

Paranasal sinus

Paranasal sinuses are air-filled spaces, communicating with the nasal cavity, within the bones of the skull and face....
es, which are air cavities in the cranial bones, especially those near the nose

Nose

Anatomically, a nose is a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for Respiration in conjunction with the mouth....
and connecting to it.

The term is also used for a chronically infected tract such as a passage between an abscess

Abscess

An abscess is a collection of pus that has accumulated in a cavity formed by the tissue on the basis of an infection process or other foreign materials ....
and the skin.

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Encyclopedia

Sinus is Latin

Latin

Anatomy

Organ (anatomy)

In biology, an organ is a biological tissue that performs a specific function or group of functions. Usually there is a main tissue and sporadic tissues....
or tissue

Biological tissue

Paranasal sinus

Nose

Abscess

An abscess is a collection of pus that has accumulated in a cavity formed by the tissue on the basis of an infection process or other foreign materials ....
and the skin. It is however distinct from a fistula

Fistula

In medicine, a fistula is an abnormal connection or passageway between two epithelium-lined organs or vessels that normally do not connect....
, which is a tract connecting two epithelialised surfaces. It can also affect the chest and lungs.

Other sinuses in the body

Maxillary sinus
Maxillary sinus

The maxillary sinus is the largest of the paranasal sinuses, and is pyramidal in shape....
Subcapsular sinus
Subcapsular sinus

The subcapsular sinus is a region within the lymph node immediately deep to the capsule that contains relatively sparse lymphocytes. It thus allows lymph to flow freely through it....