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Figure 2. TEM view of deciduous teeth. (A) Presence of a cluster of mesenchymal-like cells in the ground substance. (Arrowsheads = nucleoli; large arrows = fibroblasts). The endothelial cells are identified by the presence of cytoplasmic Weibel-Palade bodies (thin arrows). (B) Microcapillary composed of a single endothelial cell layer enclosed in the connective tissue. The collagen fibrils are arranged in different directions, forming a loose meshwork. Bars: 2 µm.