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Chemoreceptor: Heymans(1936) demonstrated that carotid bodies (small vascular spherules located at the bifurcation of the external and internal carotids) and similar structures on the arota, aortic bodies, were chemosensitive. Present evidence suggests that the chemosensitive cells of these bodies are active at the normal Po2 of the arterial blood.
Baroreceptors: Arterial baroreceptors are sensory nerve endings found in the walls of most major arteries, but they are especially abundant in the walls of the carotid sinuses and of the arotic arch.
Stretch receptors: It is linked to the medulla in the brain. It is also found in carotid artery.
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