<prompt> Derivatives of the mesonephric duct are all exceptEpidydimisDuctus deferensUreterAppendix of testis  <response>: The nephric duct which is formed in relation to the developing excretory tubules. At later stages, becomes the mesonephric ductWolffian duct, The collecting pa of the kidney is derived from a diveiculum called the ureteric bud which arises from the lower pa of the mesonephric duct, Mesonephric Wolffian duct - male derivatives - Appendix of epididymis, Epididymis, Ductus deferens, Ejaculatory ducts, Seminal vesicle, Ureter, pelvis, calyces and collecting tubules. Mesonephric Wolffian duct - Female derivatives - Appendix of ovary, Duct of epoophoron. Ref:Inderbir Singhs Human Embryology, Eleventh edition, pg.no., 265, 286. table Ref:Inderbir Singhs Human Embryology, Eleventh edition, pg.no.,286table - 10.6. 