 Plexus - Novel: Encyclopedia - PlexusA plexus is a network. In biology it has two meanings.
In many animals the processes of neurons join together to form a plexus or nerve net. This is the characteristic form of nervous system in the coelenterates and persists with modifications in the flatworms. The nerves of the radially symmetric echinoderms also take this form, where a plexus underlies the ectoderm of these animals and deeper in the body other nerve cells form plexuses of limited extent. In vertebrates nerves branch and rejoin in some parts of the body, for e ...
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