Ultrastructural Morphology of Plasma Cells in Normal Ovine Hemal Lymph Nodes |
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| Authors: | Fakhri K Al-Bagdadi Cameron L Seger Charles W Titkemeyer Louis F Archbald |
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| Institution: | Department of Veterinary Anatomy and Fine Structure School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana 70803, U.S.A. |
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| Abstract: | The fine structure of plasma cells from the hemal lymph nodes of five healthy sheep was examined. The plasma cells showed many cytoplasmic processes, indicating motility and phagocytic activity. They were randomly located in the medullary cords of the hemal lymph nodes. Their perinuclear spaces were irregular and contained granular material similar in density to that of rough endoplasmic reticulum. Some of the plasma cells provided morphological evidence of erythrophagocytosis at different levels. Such a phenomenon was previously reported only in pathological conditions. The red blood cell being engulfed by the plasma cell appeared smaller than normal. Most of the examined plasma cells showed Russell's Bodies inside the cisternae of the rough endoplasmic reticulum of the healthy hemal lymph nodes. Some of these Russell's Bodies had fuzzy borders. They were separated from the rough endoplasmic reticulum by evenly spaced halos.
Many plasma cells showed physical contacts with mast cells in the form of cell junctions, and some showed cytoplasmic continuity between the two cells. Such relations have been discussed in this article. |
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