Nervous Systems

Annelids
transmission across the synaptic gap
acetylcholine and acetylcholine esterase
neurtransmitter (neruohumor)
synaptic gaps
temporally sum
spatially sum
Brain function
Giant nerve fibers
 

Mollusks
ventral nervous of pair ganglia, regionalization of the body is accompanied by regionalization of the nervous system
distributed operating system
parallel processing

Arthropods
ventral nerve cordpairs of ganglia
some regionalization because of tagmatization
 

Echinoderms