Today's Blog is written by Brooke.
The nervous system of mollusks varies from the clams and tusk shells to the squid and octopi. The less complex organisms such as the clam have a simpler nervous system compared to the octopi which are more complex. A typical nervous system of a mollusk includes a pair of cerebral ganglia which is a mass of nerve cells. They are located in the head, mouth, and similar sense organs. The dorsal cerebral ganglia contain two pairs of longitudinal nerve cords in the mantle, also called pleural ganglia. The ventral pair of nerve cords are found in the foot and form pedal ganglia.
Source:http://geology.er.usgs.gov/paleo/mollusks.shtml
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