This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Luigi Galvani Experiment.jpeg de Luigi Galvanis FroschschenkelExperiment Versuchsanordnung aus ieeevirtualmuseum org php id lid de Dr Manuel de Later versions were uploaded by Nikolang at org de Fig Rana ad experimentum praeparata Crura Nervi sacri qui in crurales nervos abeunt quos crurales internos placet appellare