Summary
The perfused large mesenteric lymph node of the dog was observed under the scanning electron microscope.
The lymph sinus contains reticulum cells which mostly are two-dimensionally formed stellate plates oriented in a uniform direction. Large round macrophages are loosely fixed by the reticulum cell processes. No intermediate type between both cells has been observed. Macrophages having a few long tentacle-like projections are densely covered by clubbed cytoplasmic processes. Smaller round cells, probably plasma cells and lymphocytes also remained in the sinus.
The pulp of the node is built up by reticulum cells, much smaller than those in the sinus, and by densely packed round cells including a few macrophages.
The trabeculae and the reticulum of the nodal parenchyme form a continuous structure.
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Cordial thanks are expressed to Dr. Toshihiro Ishii, Professor of Anatomy of the Tohoku University Medical School, for his valuable advice. Thanks are also due to the kind cooperation of Mr. Akira Kubotsu of the Central Research Laboratories, Kuraray Co. Ltd.
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Fujita, T., Miyoshi, M. & Murakami, T. Scanning electron microscope observation of the dog mesenteric lymph node. Z.Zellforsch 133, 147–162 (1972). https://doi.org/10.1007/BF00307138
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DOI: https://doi.org/10.1007/BF00307138