A receptor area in the wall of the aortic arch near the heart sensitive to levels of carbon dioxide, oxygen, and pH in the blood. Information from the aortic body is conveyed by sensory neurones to the respiratory centre.
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A receptor area in the wall of the aortic arch near the heart sensitive to levels of carbon dioxide, oxygen, and pH in the blood. Information from the aortic body is conveyed by sensory neurones to the respiratory centre.
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| Aortic body | |
|---|---|
| The thoracic aorta, heart and other great vessels. (Aortic body not visible, but arch of aorta labeled at center.) | |
| Latin | corpora paraaortica |
| Gray's | subject #277 1277 |
| Nerve | vagus nerve [1] |
| MeSH | Aortic+Bodies |
In the human heart, the aortic body is one of several small clusters of chemoreceptors, baroreceptors, and supporting cells located along the aortic arch.
Contents |
It measures changes in blood pressure and the composition of arterial blood flowing past it, including the partial pressures of oxygen and carbon dioxide but not pH. The chemoreceptors responsible for sensing changes in blood gases are called glomus cells.
It gives feedback to the medulla oblongata via the afferent branches of the vagus nerve (X). The medulla, in turn, regulates breathing and blood pressure.
A paraganglioma is a tumor that may involve the aortic body.
Swelling can also occur.
Some sources equate the "aortic bodies" and "paraaortic bodies", while other sources explicitly distinguish between the two.[2][3] When a distinction is made, the "aortic bodies" are chemoreceptors which regulate Circulatory system, while the "paraaortic bodies" are the chromaffin cells which manufacture catecholamines.
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| heart-base tumor | |
| para-aortic | |
| aortic paraganglion (anatomy) |
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