The<unk>  (also known as archinephric<unk> , Leydig's<unk> , mesonephric<unk> , or nephric<unk>  is a paired organ found in mammals including humans during embryogenesis.
It connects the primitive kidney<unk>  body (or mesonephros) to the cloaca and serves as the anlage for certain male reproductive organs.
Wolffian duct
Vitelline duct
Gartner's duct
Excretory duct of seminal gland
Urachus
Fallopian tube
Seminiferous tubules
Concha bullosa