Figure 12From: Evidence of a true pharyngeal tonsil in birds: a novel lymphoid organ in Dromaius novaehollandiae and Struthio camelus (Palaeognathae)Follicular pharyngeal tonsil of S. camelus. The lymph nodules (Ln) are surrounded by a ring of delicate connective tissue (black arrows) richly supplied with blood vessels (Bv). Inter-nodular lymphoid tissue (Ilt) is situated between the lymph nodules and through which course prominent connective tissue (Ct) septa.Back to article page