Anatomy

" This is all so fascinating! How unreal...!"

Mizuki had an expression one could rarely see on his face, one of pure wonder.

After all it was hard to get a man such as him to feel anything other than the background radiation of amused contempt.

" There is no difference at all, none..!"

What was spread infront of Mizuki looked to be a scroll, one with thin black borders and a yellow page, the figure of human man was drawn on it, with one difference making it stand out from any other painting.

It looked to be fully transparent, with dense pathways spread throughout the whole body of said figure.

" There they are, every single one of them, just as I remember, every vessel and nerve is in the very same place. "

Eyes burning with curiousity Mizuki kept matching the image infront with one in his mind, the image now identified as human circulatory system and nural network by him.

" I had always wondered, what was it that made the Ninja here so different from the people back home.. They look the same, eat the same, breed the same and bleed the same, yet they flatten mountains at a moment's notice, all from the very same food intake as we used to back at earth, which somehow translates into enough energy to create waterfalls.. Utterly ridiculous "

Mizuki shook his head as was beginning to connect some dots together, though he wouldn't be concluding anything yet, he had a good idea on what was actually going on, his mind working fast as he went over the clues he has with him, clues to the working of this reality, how he came into a supposed story printed on a paper and the exact way an energy known as chakra makes everything fit together into a nice little package.

" These feats are all achieved using a generally equal amount of nutrition as an adult human would consume given a healthy survival scenario. I was hoping to see something different in regards to energy generation, or conduction, maybe a slightly different mitochondrion structure, one making all the difference in energy generation.. but no. It is all exactly the same. "

As for how Mizuki concluded the structure of the cell with a simple diagram of human circulatory system? If you asked Iruka, his response would be something akin to

' That my friend, is a fundamental difference is intellect, one not achievable by normal means, you have to be a natural '

And he would be wrong. As Iruka generally is.

What Mizuki was doing was something quite common among the scientific folk.

Deriving conclusions from observable data for the un observable ones. This is how the invisible fundamental forces of nature were found, this was how the universe and it's wonders were put into photographs, none of them were observable directly but every single one has indirect effect on everything surrounding them.

" Nothing in nature is all alone, there is no such thing as an fundamentally independent existence, at any given moment, multiple forces are acting, and as forces act, they tend to leave.. traceable pathways. "

Mizuki said aloud, as he started tracing his finger along the Aorta, tracing all the from the beginning, he went on, smoothly gliding his fingers, he slowly came back from where he had once began, doing a full circle.

" Cells require fuel. Be it for oxygen intake or waste disposal, there has to be paths connecting them to the whole system, every single one has to be connected to the entire system. There can be no exceptions, any exceptions would result in one simple thing, the collapse of the entire cell cluster. "

Mizuki grunted as he looked over the circulatory system one last time before he slowly folded the scroll up, gently placing it on his left he leaned down to give is back such much needed support.

" Ahh that's the spot.. "

He exclaimed as he sat down with just the right support.

" In the end, the cells themselves having any difference in structure would result in deviations, deviations themselves could have been in the form of food intake, circulation or changed path directions present in the body, even the smallest of details could have pointed me towards a whole new result, but no... it is the exact same as a normal, non ' fictional ' world human.. "

Narrowing his eyes Mizuki said in a calm yet conclusive tone.

" Which leaves me with only one conclusion. "

A/N

This is all real life science by the way. I'll be adding much of that but expect some pseudoscience sprinkled along, chakra isn't an actual scientific product afterall.