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Figure 9 | Frontiers in Zoology

Figure 9

From: Evidence of a true pharyngeal tonsil in birds: a novel lymphoid organ in Dromaius novaehollandiae and Struthio camelus (Palaeognathae)

Figure 9

Simple, tubular mucus-secreting glands (Gl) in the follicular pharyngeal tonsil of S. camelus. The secretion (S) appears to be formed by the release of whole mucus cells from the glandular epithelium. Both a round/cuboidal lymphoepithelium (Le) and ciliated columnar lymphoepithelium (Ce) line the tonsillar crypt (C). Connective tissue (Ct), inter-nodular lymphoid tissue (Ilt), capillaries (Ca), gland duct (D) and basally compressed nucleus of mucus cell (black arrow).

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Frontiers in Zoology

ISSN: 1742-9994