It stores the sperm and secretes it to the duct in ejaculation.
In addition, it cools blood on the way to the testicles and also warms it back up again on return. Look at the drawing of an epididymis in Gray's anatomy and you'll see a diagram for a heat exchanger similar to that used in nuclear power plants, which of course came along much later.
The epididymes also produce glycerophosphocholine (GPC) and other chemicals that help sperm mature.
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Uncoiled the Epididymis would be approximately nineteen feet in length
Dust has no function; it simply exists.
Colonial legislators saw their primary function as?
To serve a ritual function.
The function keys on the BBC Microcomputer were coloured red.