The elasmobranch kidney. III. Fine structure of the peritubular sheath.

@article{Lacy1986TheEK,
  title={The elasmobranch kidney. III. Fine structure of the peritubular sheath.},
  author={Eric R. Lacy and Enrico Reale},
  journal={Anatomy and embryology},
  year={1986},
  volume={173 3},
  pages={299-305}
}
In the kidney of two elasmobranch fish, the little skate (Raja erinacea) and the spiny dogfish (Squalus acanthias), each tubular bundle is wrapped by a continuous sheath of extremely flattened cells which are ordered in several closely superimposed layers. Thin sections and freeze-fracture replicas demonstrate that extensive tight junctions exist between the cells of this peritubular sheath. The sheath cells lie on a discontinuous basement membrane which suggests that they do not belong to the… CONTINUE READING