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・ Aorotrema
・ Aorotrema cistronium
・ Aorounga crater
・ Aorsi
・ Aorta
・ Aorta (band)
・ Aorta Ridge
・ Aorta-gonad-mesonephros
・ Aortic aneurysm
・ Aortic arch
・ Aortic arches
・ Aortic bifurcation
・ Aortic body
・ Aortic cross-clamp
・ Aortic dissection
Aortic hiatus
・ Aortic insufficiency
・ Aortic orifice
・ Aortic plexus
・ Aortic pressure
・ Aortic rupture
・ Aortic sac
・ Aortic sinus
・ Aortic stenosis
・ Aortic unfolding
・ Aortic valve
・ Aortic valve area calculation
・ Aortic valve repair
・ Aortic valve replacement
・ Aortic valvuloplasty


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Aortic hiatus : ウィキペディア英語版
Aortic hiatus

The aortic hiatus is a hole in the diaphragm. It is the lowest and most posterior of the large apertures.
It is located approximately at the level of the twelfth thoracic vertebra (T12).
==Structure==
Strictly speaking, it is not an aperture in the diaphragm but an osseoaponeurotic opening between it and the vertebral column, and therefore behind the diaphragm (Meaning that diaphragmatic contractions do not directly influence the Aorta or aortic supply).
Occasionally some tendinous fibers prolonged across the bodies of the vertebræ from the medial parts of the inferior ends of the crura pass posterior to the aorta, and thus convert the hiatus into a fibrous ring.
The hiatus is situated slightly to the left of the mid line, and is bound anteriorly by the crura, and posteriorly by the body of the first lumbar vertebra.

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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