Epididymis

The epididymis is an organ that contains the efferent ductules and the duct of the epididymis

The epididymis is a crescent-shaped structure that lies along the superior and posterior surfaces of the testis. It measures about 7.5 cm in length and consists of the efferent ductules and the duct of the epididymis and associated vessels, smooth muscles, and connective tissue coverings (Fig. 21.22). The duct of the epididymis is a highly coiled tube measuring 4 to 6 m in length. The epididymis is divided into a bead, a body, and a tail (see Fig. 21.4). The efferent ductules occupy the head, and the duct of the epididymis occupies the body and tail. Newly produced sperm, which enter the epididymis from the testis, mature during their passage through the duct of the epididymis, acquiring motility and the ability to fertilize an oocyte. During this androgen-dependent maturation process, the head of the sperm is modified by the addition

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