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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A reexamination of rat ductuli efferentes.

In 33 testes from a random selection of rats a 10% suspension of India ink in normal saline was introduced through the rete testis into the emergent ductuli efferentes. Low-power microscopy and microradiography confirmed the individually independent origin of each ductule. Five ductules were isolated in each of 17 testes, 4 ductules in 6, 6 ductules in 8, and in 2 testes, 7 and 9 ductules, respectively. In six animals minor variations existed as between the right and left testes +/- 1 in 4 and +/- 2 in 2. It is necessary to exercise great caution in the interpretation of results of experimental work on alteration of the ductuli, because of variability between colonies and within strains of rats.[1]


  1. A reexamination of rat ductuli efferentes. Lewis-Jones, D.I., Harrison, R.G., Macmillan, E.W. Anat. Rec. (1982) [Pubmed]
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