The C-ISO-F3 is a set of three color-coded lead wires with longer and more flexible silver wire electrodes for recording biopotentials from animal tissues. Like the C-ISO-N3 leads, the C-ISO-F3 lead wires have colored safety connectors for use with the inputs of the standard C-AAMI recording cable included in iWorx teaching kits. The other end of each C-ISO-F3 lead wire has a flexible 24-gauge silver wire electrode (80 mm long) that can be shaped to conform to the surface of a tissue or organ. These electrodes can be used for recording ECGs from the hearts or EMGs from muscles.