Azygos
Azygos
Azygos (pronunciation: /ˈazɪɡɒs/) is a term used in anatomy to describe structures that are unpaired or occur singly, in contrast to the majority of structures in the body which are paired. The term is most commonly associated with the Azygos vein, a single vein that can be found in the thoracic region of the body.
Etymology
The term 'Azygos' is derived from the Greek word 'azygos', which means 'unpaired'. It is a combination of the prefix 'a-', meaning 'not', and 'zygon', meaning 'yoke'. This reflects the unpaired nature of the structures that the term is used to describe.
Related Terms
- Azygos vein: A vein that is unpaired and is located in the thoracic region of the body. It serves to drain the thoracic wall and upper lumbar region.
- Azygos lobe: An anatomical variant of the lung, where an accessory fissure separates a portion of the right upper lobe, creating an extra or 'azygos' lobe.
- Azygos continuation of Inferior Vena Cava: A rare anatomical variation where the Inferior Vena Cava (IVC) is absent and the azygos vein continues as the IVC.
External links
- Medical encyclopedia article on Azygos
- Wikipedia's article - Azygos
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