Variation of lymphoid activity in the spleen of a migratory bird, the pied flycatcher (Ficedula hypoleuca; Aves, passeriformes).

@article{Fnge1985VariationOL,
  title={Variation of lymphoid activity in the spleen of a migratory bird, the pied flycatcher (Ficedula hypoleuca; Aves, passeriformes).},
  author={Ragnar F{\"a}nge and Bengt Silverin},
  journal={Journal of morphology},
  year={1985},
  volume={184 1},
  pages={
          33-40
        }
}
The size and microscopic structure of the spleen of the migratory pied flycatcher (Ficedula hypoleuca) show marked changes during the reproductive cycle. Upon the spring return to their northern breeding sites, the birds have a small spleen with little lymphoid activity and a poorly developed red pulp. During the breeding period the volume of red and white pulp increases, the number and distinctness of lymphoid follicles (germinal centres) in the white pulp increase, and groups of cells with… CONTINUE READING
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