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Old 01-18-2013
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Vascular Carotid and Aortic Body and Sinus!

Anyone could explain about differentiation between carotid body, carotid sinus, aortic body and sinus?
Thank you
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Old 01-18-2013
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The carotid body is a small cluster of chemioreceptors and supporting cells located near the carotid artery.
The carotid sinus is a localized dilation of the Internal carotid artery at its origin.


The aortic body is one of several small clusters of chemoreceptors,baroreceptors and supporting cells located along the aortic arch.
An aortic sinus is the anatomic dilation of the ascending aorta, which occurs just above the valve of aorta
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Old 01-18-2013
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Originally Posted by shwetha99 View Post
Anyone could explain about differentiation between carotid body, carotid sinus, aortic body and sinus?
Thank you
Carotid+aortic bodies are chemoreceptors: meaning that they respond to chemical composition of the blood (mostly O2 but some CO2 fluctuations too).

Aortic arch+ carotid sinus are baroreceptors. Aortic arch is innervated by vagus which goes to the medulla and responds to high blood pressure
Carotid sinus is innervated by glosspopharyngeal nerve and goes to medulla and responds to inc/dec BP
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Old 01-18-2013
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Originally Posted by shwetha99 View Post
Anyone could explain about differentiation between carotid body, carotid sinus, aortic body and sinus?
Thank you

Carotid body - think of oxygen. It's regulation of oxygen. When there is decreased oxygen < 59 mmHg, carotid body will be activated.

Carotid Sinus - think of blood pressure. It's regulation of blood pressure.
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Old 01-19-2013
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i want to add 1 more diffrentiation i.e impulses form carotid body r carried by glossopharngeal nerve and impulses from aortic body is carried by vagus nerve.
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