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. 2022 Aug 30;12(17):2235. doi: 10.3390/ani12172235

Figure 1.

Figure 1

The histological cross-sections (HE staining) of the ear canal in a common dolphin (A) 169/17, and bottlenose dolphin (B) 457, at about 1 and 3 cm beneath the skin, respectively, and at about 4 cm beneath the skin in striped dolphin (C,D) 292/18 and (E) 274/18, at the level of the cartilage (3). Note the presence of glands and glandular ducts (2) and mononuclear cells (arrowhead). Scale bar (A) 100 µm, (B) 50 µm. Histological image (HE staining) of the mononuclear cells (lymphocytes) in the subepithelial tissue associated with the ear canal at the level of the glands (A–C), and in the reticular connective tissue network with blood vessels (4) and vascular lacunae (5) between the ear canal and cartilage. Scale bar top: (A,C,D) 100 µm; (B,E) 50 µm.