Abstract
SummaryThe right and left carotid body and carotid baroreceptor zone of six adult domestic fowls were examined. Nerve cell bodies were found in nine of the twelve carotid bodies and in ten of the twelve carotid baroreceptor zones. They showed the general ultrastructural features of autonomic neurons. Nerve cell bodies in both locations contained intranuclear inclusion bodies and cytoplasmic dense cored vesicles. A few presumptive adrenergic endings, and dendritic processes were associated with nerve cell bodies in the carotid body. Large numbers of presumptive adrenergic endings and presumptive cholinergic endings, and dendritic processes were associated with nerve cell bodies in the carotid baroreceptor zone. The possible identity and function of these nerve cell bodies are discussed.
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