the cerebral peptidergic caudodorsal cells of the freshwater snail lymnaea stagnalis control egg laying and egg-laying behaviour by releasing peptides into ( 1 ) the haemolymph , from neurohaemal axon terminals in the periphery of the cerebral commissure and ( 2 ) the intercellular space of the central nervous system , from collaterals in the inner compartment of this commissure .
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the
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axon terminals