Biology of Bone Tissue: Structure, Function, and Factors That Influence Bone Cells

Figure 2

Electron micrographs of portions of alveolar bone of rats. (a) Oteoblasts exhibiting abundant rough endoplasmic reticulum are observed adjacent to the bone (B) surface. A layer of bundles of collagen fibrils situated between osteoblasts (Ob) and calcified bone surface (B) constitutes the osteoid (Otd). Scale bar: 2.7 μm. (b) Bone lining cells (BLC) exhibiting scarce cytoplasm are situated on the osteoid surface (Otd). Bone lining cells (BLC) extend some thin cytoplasmic projections (arrows) towards the osteoid (Otd). Scale bar: 2 µm. N: nucleus.

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