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carotid body

noun

Anatomy.
  1. a small mass of cells and nerve endings adjacent to the carotid sinus that, in response to chemical changes in the blood, adjusts the respiratory rate.

carotid body

  1. A mass of tissue near the carotid sinus that contains chemical receptors sensitive to oxygen and pH levels in the blood and that is involved in the regulation of respiratory activity.
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Word History and Origins

Origin of carotid body1

First recorded in 1935–40
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