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Figure 4


Fig. 4. Electron micrographs of type A cells from hypothyroid rat Harderian gland (HG). (A) Autophagic vacuoles (asterisks) can be seen close to smooth endoplasmic reticulum (arrow). Arrowheads indicate glycogen granules; m, mitochondria. Scale bar, 1.2 µm. (B) A cytoplasmic vacuole showing the characteristic lamellar substructures (arrows). (C) A secretory vacuole showing concentric systems of lamellae. Scale bars, 1 µm.