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| Bronchial arteries ： ウィキペディア英語版 |
Bronchial artery
In human anatomy, the bronchial arteries supply the lungs with nutrition and oxygenated blood. Although there is much variation, there are usually two bronchial arteries that run to the left lung, and one to the right lung.
==Origin==
The ''left bronchial arteries'' (superior & inferior) usually arise directly from the thoracic aorta.
The single ''right bronchial artery'' usually arises from one of the following:
* 1) the thoracic aorta at a common trunk with the right 3rd posterior intercostal artery
* 2) the superior bronchial artery on the left side
* 3) any number of the right intercostal arteries mostly the third right posterior.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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