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Figure 8 | Frontiers in Zoology

Figure 8

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

Figure 8

Follicular pharyngeal tonsil of S. camelus. Note the simple, tubular, mucus-secreting glands (Gl) which are invaded by lymphoid tissue, forming lymph nodules (Ln) and inter-nodular lymphoid tissue (Ilt). Glandular secretion (S) fills the tonsillar crypts (C). Connective tissue septa (Ct) surround the lymphoid tissue and distribute larger blood vessels (Bv).

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Frontiers in Zoology

ISSN: 1742-9994