Ultrastructural observations on the phoronid nervous system.

  title={Ultrastructural observations on the phoronid nervous system.},
  author={Isabel Fern{\'a}ndez and Fernando Pardos and J. C. Sim{\'o}n Benito and Carmen Rold{\'a}n},
  journal={Journal of morphology},
  volume={230 3},
Standard transmission electron microscopy (TEM) techniques have been applied to three species of phoronids to describe cytological features of their nervous systems. Four types of neurons have been distinguished by morphological and ultrastructural criteria, mainly involving their kinds of vesicles. Glial cells with characteristic polymorphic dense granules are abundant in the plexus, with possible roles in neuronal nourishment, mechanical support, and neurosecretion. Synaptic contacts and… CONTINUE READING