The deferent ducts were usually less fully filled (black arrows in Fig.
In fact, in spiders, seminal secretions are added to the sperm in testes and deferent ducts (Herberstein et al.
Additionally, the serosa covering the deferent duct
was easier to tear with biopsy forceps, which allowed a more precise grip of the duct compared with the use of grasping forceps.
Kimura stated that true crossed testicular ectopia is only if there are two distinct deferent ducts
, a common duct suggesting the development of the testis from one genital ridge.
Parallel to the epididymal ducts and deferent ducts are the ureters, which lead into the cloaca (Figure 2B).
The seminiferous or spermatic ducts, efferent ductules, epididymis and deferent ducts are derived from archinephric duct, which is an organ for the transport of both urine and sperm in anamniotic vertebrates (ROMER; PARSONS, 1985; ORR, 1986).
The deferent ducts
were translucent, thin and poorly developed in immature males; opaque and expanded, with spermatophores in intermoult mature males; and translucent and without spermatophores in postmoult mature males.