How does the Cnidocyte of a Cnidarian Function? A cnidocyte, cnidoblast or nematocyte, is a type of venomous cell unique to the phylum Cnidaria (corals, sea anemones, hydrae, jellyfish, etc.).
Such cells are called stem cells. Stem cells are those undifferentiated cells which have the potential to become specialized to form a specific type of cell. For instance, mesenchymal stem cells are a type of stem cells which can differentiate into osteoblasts, chrondocytes, myocytes and adipocytes.
Myelinated nerves have a special type of cell wrapped around them called Schwann cells; unmyelinated nerves are not wrapped in Schwann cells. The Schwann cells increase the speed at which impulses travel along the axon, thus making myelinated nerves much faster at transmitting information than unmyelinated nerves.