The epididymis is a long (4 - 5 meters), highly coiled tube, along which sperm mature as they move from the testis to the vas deferens. This tube is surrounded by smooth muscle and embedded within a loose, vascular stroma. Smooth muscle becomes thicker as the duct approaches the vas.
The lumen of the epididymal duct contains spermatozoa and is lined by a pseudostratified columnar epithelium with apical stereocilia.
The epithelium of the epididymal duct is similar to that lining the vas deferens.
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Last updated: 19 May 2022 / dgk