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Fig. 2. Electron micrographs of type A cells from euthyroid rat Harderian gland
(HG). (A) Large cytoplasmic vacuoles filled with moderately electron dense
material occupy all the cytoplasm. The basal nucleus (N) has a prominent
nucleolus. Scale bar, 7 µm. (B) Mitochondria with numerous tubular cristae
and glycogen granules (arrows) are observed throughout the cytoplasm. Scale
bar, 1 µm.