Earthworms were put in a petri-dish containing physiologic serum and received an electric shock every 3 s using a 9 V battery. Coelomic fluid was excreted through nephridiop- ores into petri-dish and used as pure sample throughout the experiments.
Earthworms were put in a petri-dish containing physiologicserum and received an electric shock every 3 s using a 9 Vbattery. Coelomic fluid was excreted through nephridiop-ores into petri-dish and used as pure sample throughout theexperiments.