Aortic body
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| Aortic body | |
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| 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 |
| Dorlands/Elsevier | b_17/12190576 |
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In the human heart, the aortic body is one of several small cluster of chemoreceptors, baroreceptors, and supporting cells located along the aortic arch.
Function
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.
Disorders
A paraganglioma is a tumor that may involve the aortic body.
Swelling can also occur.
Nomenclature
Some sources equate the "aortic bodies" and "paraaortic bodies",[1] while other sources explicitly distinguish between the two.[1][1] When a distinction is made, the "aortic bodies" are chemoreceptors which regulate circulation, while the "paraaortic bodies" are the chromaffin cells which manufacture catecholamines.
References
See also
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
