Complex sentence: In neurological contexts, ganglia are composed mainly of somata and dendritic structures that often interconnect with other ganglia to form a complex system of ganglia known as a plexus.
Split into simpler sentences: In neurological contexts, ganglia are composed mainly of somata and dendritic structures which are bundled together. Ganglia often interconnect with other ganglia to form a complex system of ganglia known as a plexus.