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The seminiferous tubules converge on a plexiform arrangement of spaces, the rete testis (arrow), which is supported by a highly vascular collagenous connective tissue. The rete testis are lined by a single layer of cuboidal epithelial cells, some of which may possess a flagellum. Flagellar activity is thought to assist the progress of spermatozoa, which do not become motile until after maturation is completed in the epididymis. |