The kidney duct without doubt serves as vas deferens, and we have found in it masses of yellowish colour similar to the substance in the vasa efferentia identified by us as remains of spermatozoa.
The vasa efferentiaof the testes in Scyllium are very typical, but there are some forms in which they are more numerous as well as others in which they are less so.
Perhaps the vasa efferentia are seen in their most typical form in Centrina as described and figured (Pl.
The first of these concerns the structure and fate of the pronephros, the second the nature of the oviduct, and the third the presence of vasa efferentia in the male.
The exact mode of junction of the separate vasa efferentia with the testis is difficult to make out on account of the opacity of the basal portion of the testis.
Footnote 538: The females we examined, which were no doubt procured at the same time as the male, had their oviducts filled with ova: and it is therefore not surprising that the vasa efferentia should be naturally injected with sperm.
Considerable phylogenetic difficulties as to the relationships of Ganoidei and Elasmobranchii are removed by the discovery that Ganoids were originally provided with a system of vasa efferentia like that of Elasmobranchii.
From my figure, representing the anterior part of the Wolffian body of a nearly ripe embryo, it will be seen that there are five vasa efferentia (v.
Network formed by vasa efferentia on inner face of testis.
Inner aspect of the posterior lobe of the testis from the same example, to shew the vasa efferentia forming a network on the face of the testis.
Mr Haddon, are shewn the vasa efferentia and their junctions both with the testes and the kidney.
Mustelus and Centrina, canals (the vasa efferentia of Spengel) pass off to Malpighian bodies.
The vasa efferentia and longitudinal canal are coloured to render them distinct.
Vasa efferentia of a male embryo of Scyllium canicula eight centimetres in length.
Section through the inner aspect of a portion of the testis and mesorchium, to shew the network of the vasaefferentia (nve) becoming continuous with the seminal tubes (st).
The granular matter nearly filling the vasa efferentia and the seminal tubes represent the spermatozoa.
The anterior four vasa efferentia of a nearly ripe embryo.
Anterior extremity of Wolffian body of a young male Scyllium canicula shewing the vasa efferentia and their connection with the kidneys and the testis.
C, Reduction of vasa efferentia to a single one posteriorly (Protopterus).
The number of vasa efferentia varies and in the rays (Raia, Torpedo) may be reduced to a single one opening directly into the front end of the mesonephric duct.
In Selachians the vasaefferentia are restricted to the anterior end of testis and kidney, and are connected by a longitudinal canal ending blindly in front and behind.
In Protopterus the vasa efferentia are reduced to a single one on each side at the extreme hind end of the testis.
In Lepidosiren[24] a small number (about half a dozen) of vasa efferentia occur towards the hind end of the vesicular part of the testis and open into Malpighian bodies.
Lepidosteus[25] numerous vasa efferentia arise from the testis along nearly its whole length and pass to a longitudinal canal lying on the surface of the kidney, from which in turn transverse canals lead to the Malpighian bodies.
In all probability the series of vasa efferentia was originally spread over the whole length of the elongated testis (cf.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "efferentia" in a variety of sentences. We hope that you will now be able to make sentences using this word.
