Dyshliuk, N.
(2020).
THE CELLULAR COMPOSITION OF THE ESOPHAGEAL TONSIL OF CHICKENS IN THE POSTNATAL PERIOD OF ONTOGENESIS.
Ukrainian Journal of Veterinary Sciences,
11(1),
-.
https://doi.org/10.31548/ujvs2020.01.002
In mammals, the first protective barrier to antigen entry through the digestive system is the Valdeier-Pirogov pharyngeal lymphoid ring, which is absent in birds. In the la
chickens, esophageal tonsil, lymphoid tissue, cells of the lymphoid row, reticular cells, heterophils, fibroblasts