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Macrophages, a normal component in seasonally involuting testes of the swan, Cygnus olor

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Summary

In the swan, Cygnus olor, spermatogenesis shows a pronounced seasonal cycle. During the long involution phase a transient invasion of macrophages into the seminiferous tubules regularly takes place at the height of regression prior to total rest. These macrophages are involved in the additional disposal of supernumerary and degenerating premature germ cells, at a time when the Sertoli cells are already filled with phagolysosomes.

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Breucker, H. Macrophages, a normal component in seasonally involuting testes of the swan, Cygnus olor . Cell Tissue Res. 193, 463–471 (1978). https://doi.org/10.1007/BF00225344

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  • DOI: https://doi.org/10.1007/BF00225344

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