Thymus of Buffalo: Ultra Structural Perspective
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Authors
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Tej Parkash
College of Veterinary Sciences Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar - 125004 (Haryana)
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Amit Poonia
College of Veterinary Sciences Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar - 125004 (Haryana)
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Parveen Kumar Gahlot
College of Veterinary Sciences Lala Lajpat Rai University of Veterinary and Animal Sciences, Hisar - 125004 (Haryana)
Keywords:
Buffalo, Thymus, Thymic epithelial cells, Transmission electron microscope.Abstract
Ultrastructural features of the thymus were studied in five young buffalo with age ranges from 1 to 1.5
years old. In the cortex, densely packed thymocytes (lymphocytes) in various stages of differentiation were
observed. The shapes of thymocytes were round to elliptic in outline. The cytoplasm was poor in terms of
organelles. Thymic epithelial cells (TEC) were also observed throughout the cortex. They were characterised by
pale, electron-lucent cytoplasm, irregular shape with long cytoplasmic processes connected to each other by
desmosomes to form a reticular network. In medulla, a loose arrangement of mature thymocytes, and medullary
thymic epithelial cells (TECs) were observed. There was degenerative nuclear and cytoplasmic structure in the
central part of Hassall's corpuscles. Additionally, other cell types within the thymus, including macrophages and
mast cells, which contribute to the phagocytic clearance of apoptotic thymocytes and antigen presentation were
also observed.
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