Board Thread:Theories and Speculation/@comment-30168130-20170319171713/@comment-24824859-20170326212731

Thekillman wrote: Explain then kakuzu and Sasori. You can't. Sasori was literally just a heart in a puppet. The heart is the (primary) source of chakra. This is also supported by the Eight Gates, where the final gate is the heart. Kakazu can easily remove hearts and it is easier to integrate into himself ,while in battle, than other parts of the body. The same can be said about Sasori. The entire body is the primary source of chakra, not the heart, otherwise: Need me to go on? So, like I said, the heart is not the primary source of chakra
 * Orochimaru wouldn't be able to completely resurrect out of those with the Curse Mark
 * Karin, probably the best non-Rikudo sensor in the series, couldn't properly sense Kabuto who injected himself with the blood of many individuals.
 * Users of the Eighth Gate would start with the heart, the so-called source of chakra
 * Chakra wouldn't constantly be depicted as being made in the abdominal region