American Urological Association - Rete Testis
- Anastomosing network of delicate channels located at testicular mediastinum (image A).
- Receives the luminal contents of seminiferous tubules and moves it on to the efferent ductules; usually lumen is empty indicating rapid transit.
- Lined by a single layer of cuboidal epithelial cells, some of which may possess a flagellum (image B).
- Flagellar activity is presumed to aid the progress of spermatozoa, which do not become motile until after maturation is complete in the epididymis.