Name = Aortic body
Latin = corpora paraaortica
GraySubject = 277
GrayPage = 1277
Caption = The thoracic aorta, heart and other great vessels. (Aortic body not visible, but arch of aorta labeled at center.)
MeshName = Aortic+Bodies
MeshNumber = A08.800.550.700.120.600.050
DorlandsPre = b_17
DorlandsSuf = 12190576
In the human heart, the aortic body is one of several small clusters of
chemoreceptors, baroreceptors, and supporting cells located along the aortic arch.
It measures changes in blood pressure and the composition of arterial blood flowing past it, including the partial pressures of
oxygenand carbon dioxidebut not pH. The chemoreceptors responsible for sensing changes in blood gases are called glomus cells.
It gives feedback to the
medulla oblongatavia the afferent branches of the vagus nerve(X). The medulla, in turn, regulates breathing and blood pressure.
paragangliomais a tumor that may involve the aortic body. Swellingcan also occur.
Some sources equate the "aortic bodies" and "
paraaortic bodies", while other sources explicitly distinguish between the two. [MeshName|Aortic+Bodies] [MeshName|Para-Aortic+Bodies] When a distinction is made, the "aortic bodies" are chemoreceptorswhich regulate circulation, while the "paraaortic bodies" are the chromaffin cellswhich manufacture catecholamines.
Control of respiration
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