I recently took a class which extensively covered the early squid giant axon research. While they are very far away from us in the evolutionary tree, the overal

I recently took a class which extensively covered the early squid giant axon research. While they are very far away from us in the evolutionary tree, the overall mechanisms are very similar. You might also want to check out Otto Loewi's famous frog heart experiments. https://en.wikipedia.org/wiki/Otto_Loewi https://en.wikipedia.org/wiki/Otto_Loewi