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One epididymis (pl: epididymides) is located above each testis. The epididymides receive sperm from the testes. In addition to storage, the epididymides provide a maturation zone, "quality control center" and give time and space for capacitation to begin.

The duct of the epididymis is lined with stereocilia. The name stereocilia is a misnomer. They are not cilia at all, but rather flexible, nonmotile microvilli that absorb excess fluid and pass nutrients to the sperm in the lumen of the tubule.

cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) cut section of the epididymis tubule (exterior is surrounded by smooth muscle) tubule lumen stereocilia pseudostratified columnar epithelium pseudostratified columnar epithelium smooth muscle smooth muscle pseudostratified columnar epithelium sperm in tubule lumen stereocilia pseudostratified columnar epithelium pseudostratified columnar epithelium stereocilia smooth muscle smooth muscle pseudostratified columnar epithelium smooth muscle