Good News for Mammals
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current control system was located in the nerves now had to be expanded
to include the electrical properties of the epidermis as well. The nerve
fibers joined the epidermal cells like plugs into sockets to complete the
exact circuit needed for a dedifferentiative current. Furthermore, since
the neuroepidermal junction was located over the end of the stump, it
continually produced blastemal cells exactly where needed, at the grow-
ing tip. This discovery was enormously important, then, because it
proved beyond doubt that the electrical current was the primary stim-
ulus that began the regenerative process, and that it could operate even
in mammals.
PRODUCING A REGENERATION CURRENT IN RATS