The Tonsils Revisited: Review of the Anatomical Localization and Histological Characteristics of the Tonsils of Domestic and Laboratory Animals

Figure 6

Anatomical localization and histological characteristics of the canine tonsils. (a) Median section through a canine head. The insert shows a higher magnification of the region in which the tonsils are located. In the dog, the lingual (lower boxed area of the insert), palatine (asterisk), and pharyngeal tonsils (upper boxed area of the insert caudodorsal to the opening of the auditory tube (arrow)) are present. (b) Histological section through the palatine tonsil that is partly covered by the semilunar fold. (c) Histological view of a part of the lingual tonsil that is composed of scattered aggregations of lymphoid cells (arrow). (d) Histological section through a part of the pharyngeal tonsil.