giant squid axon

The giant squid axon is a large nerve fiber from the giant squid, used in scientific research to study nerve signals. Its unusually thick diameter—up to 1 millimeter—makes it easier to record electrical activity, helping scientists understand how nerves transmit impulses. This axon allowed researchers to discover fundamental principles of neuroscience, such as how neurons send signals through electrical pulses called action potentials. Its size and accessibility made it a crucial model for studying nerve function, contributing significantly to our knowledge of how nervous systems operate both in animals and humans.