Soul Changes Are Irreversible

After witnessing Uchiha Ensei's strength, Tsunade seemed to have figured out what drove him. Aside from occasionally getting carried away with teaching him, she stopped causing any trouble.

Yet because of her exceptional medical skills and extraordinarily detailed understanding of the human body, Uchiha Ensei had no choice but to put up with those minor flaws.

From Tsunade, Uchiha Ensei made up for the systematic Medical Ninjutsu knowledge he had always lacked.

Of course, the Ninja World's medical system was extremely underdeveloped. In some respects, it was even inferior to the most basic medical knowledge from his previous life.

For example, emergency hemostasis...

Tsunade's former boyfriend, Dan Katō, had died because his damaged internal organs could not be stopped from bleeding. That was also why Tsunade developed hemophobia.

If it had happened now, Uchiha Ensei would have had many ways to delay Dan Katō's death.

He could forcibly stop the bleeding, use chakra to maintain his vital signs, then find a way to replace his organs.

How could he forcibly stop bleeding? Pinch off the blood vessels, cauterize the wounds, or, if all else failed, establish extracorporeal circulation and remove all the organs. As long as he kept the patient alive for several hours, he could slowly replace them afterward.

But in the Ninja World, organ transplantation was still taboo. No one studied it at all.

And some hemostatic methods were, in fact, quite primitive...

No, they were not primitive. Under normal circumstances, there simply was no opportunity for this kind of treatment, so naturally there was little experience.

Still, an imperfect medical system was still a rigorous system. It happened to help a self-taught practitioner like Uchiha Ensei make up for many things he had never noticed.

Naturally, Tsunade also learned from Uchiha Ensei about techniques such as cloning