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KMID : 0376219820190020171
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Chonnam Medical Journal
1982 Volume.19 No. 2 p.171 ~ p.183
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The Fine Structure of the Carotid Body of the Suncus Murinus
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Abstract
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The fine structure of the carotid body in normal and 5-hydroxydopamineadministrated Suncus murinus was observed with electron microscope.
In the thin-walled blood capillaries the fenestrated endothelium was not observed.
The cytoplasm of the glomus cells contained numerous dense-cored vesicles, mitochondria, granular endoplasmic reticulum and Golgi complex. In 5hydroxydopamine-treated Suncus murinus, the cytoplasmic organelles of the glomus cells showed no detectable morphological alterations.
The nerve endings which surrounded glomus cells were observed in the carotid body. Large calyx-type endings contained synaptic vesicles, mitochondria, and a few dense-cored vesicles.
At the junctions between nerve ending and glomus cells present regions of increased density in both intercellular space and adjoining cytoplasm. Some regions of the nerve endings were presynaptic to, glomus cells and some were postsynaptic element.
On the basis of the structure of the synaptic membrane and vesicles, it was apparent that these synaptic juctions were afferent.
After administration of 5-hydroxydopamine, the core materials within the vesicles of the adrenergic nerves increased in density, while the vesicles of the cholinergic nerves remained empty.
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