The ultrastructure and source of nerve endings in the carotid body
Tóm tắt
The fine structure of nerve endings in the cat carotid body was analyzed by serial section electron microscopy. In the normal animal, three types of intralobular endings can be recognized. The first type consists of large, calyciform endings which surround glomus cells. The second type includes small calyciform endings which arise from a thin axon and also contact glomus cells. Interstitial enlargements enveloped by sustentacular cells having no direct contact with glomus cells constitute a third type of nerve ending. Intracranial section of the glossopharyngeal nerve caused no change in the number or appearance of intralobular endings, indicating that they are afferent terminals. Stromal axons in the connective tissue of the carotid body may be autonomicfibers as indicated by their degeneration following removal of the superior cervical ganglion.
Tài liệu tham khảo
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