title: A note on lymphoid aggregations in the oesophagus of the frog (Rana cancrivora).
mesh_terms: D000717:Anatomy, Comparative; D000818:Animals; D001001:Anura / Q000033:anatomy & histology*; D002025:Bufonidae / Q000033:anatomy & histology; D004947:Esophagus / Q000033:anatomy & histology*; D006654:Histology, Comparative; D008221:Lymphoid Tissue / Q000166:cytology*