Carotid body
Carotid body: A small “body” of tissue rich in capillaries, at the spot the carotid artery branches in the neck, containing cells that sense the oxygen and carbon dioxide levels in blood and from which messages are dispatched to the medulla (in the brain) to regulate the heart rate.
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Carotid stenosis: Abnormal narrowing of the carotid artery, often a preamble to a stroke.
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