Swallowing up her donut, Shinobu steps away from the wall and forwards onto her training.
"In every cell in a being's body, chakra is moulded by the combination of both the spiritual and physical energies in a being. The circulatory system inside a being's body is where chakra flows. In the circulatory system, there are eight inner gates, which act as both storage and chakra regulation. Tenketsu are small openings scattered all around the circulatory system, which allow a being to release chakra from their body. There are 361 tenketsu in total. Chakra is essential for the usage of all jutsu."