Epididymis
The epididymis is composed of the long, convoluted epididymal duct that connects the efferent ductules of the testis with the ductus deferens. it appears as a firm, arcing appendage on one side of the testis along its long axis.
The epididymis houses the spermatozoa as they mature before they are expelled by ejaculation. Spermatozoa are immature when they leave the testis and must undergo a period of maturation (usually 10-15 days) within the epididymis before they are capable of fertilizing ova. The epididymis is arbitrarily divided into a head (into which the efferent ductules empty), a body lying on the long axis of the testis, and a tail that is attached by ligaments directly to the testis and to the adjacent vaginal tunic. The duct of the epididy- mal tail continues as the ductus deferens, which conveys sperm from the testis to the urethra.
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