FIGURE 3. Histological sections of lungs of rats in response to dietary and MCT treatment. Staining: Masson Trichrome and Magnification: 600x. (A) Representative section of the lung of a control rat. No significant abnormalities. The b-carotene-supplemented rats did not differ from the rats fed the control diet (not shown). (B) Representative section of the lung of a rat receiving MCT. Severe and widespread inflammatory reaction with large number of inflammatory cells and macrophages (small black arrowhead). Red cells are spread in the septa and the alveolar lumen (large white arrowhead). Septal walls are thicker with increased collagen deposition (small white arrow). A small artery shows narrowing of the lumen and increased thickness of the media with significant collagen deposition and presence of inflammatory cells
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