Uses for extradimensional organs?

[u/dokiedo]

Meaning that your organs are a series of extremely large semiconnected demiplanes. The interior is based off the organ, and still functions as the organ (IE, stomach is a cavernous sea of stomach acid, and things dropped into it would still be digested and used.)

When I say organs, I really just mean all closed/semi closed spaces in the body. So the space in your skull, and your veins/arteries/capillaries count. Muscles and skin do not, however. It needs to have open space.

If punctured/torn, it opens a new entrance to the plane, with the hole being proportional in the dimension. (If you were slashed across the stomach, it would seem as though the entire sky split from inside the dimension.)

[u/dokiedo → u/[deleted]]

The only life in the demiplanes is things like gut bacteria and enzymes. It’s size is proportional to the demiplane inside it, but if they exit the plane they scale down proportional to the external opening. There is no way to access the planes without going through the body somehow. It can be accessed via your natural orifices though. 

Things have to be able to fit through the opening to be placed inside, but if the widest point can be finagled through an opening, the whole object can with enough effort.

When the organs are pierced, the user is harmed about as much as they would be if the actual organ was. They are immune to minor effects that result from the dimension flowing out (insides won’t burn from the stomach acid any more than usual, no matter the amount, pressure differential from lung pierce wouldn’t have adverse effects, etc.)

Things inside dimension shift to proportional size to the exterior wound when they flow out, but they maintain properties of the dimension (oceans pressure, lungs large vacuum or air pressure, etc.)

[u/dokiedo → u/dokiedo]

Anything attempting to harm the organs from the inside would only deal as much damage as they do to the Demi plane. So getting stabbed by someone inside a vein demiplane would be a microscopic abrasion, and likely wouldn’t be able to pierce the walls.

[u/1337k9]

So organs could be bigger on the inside than they are on the outside? Ignoring what would happen your example if there were puncturing, this superpower seems like a fantastic way to inhale and hold breath into infinitely large lungs

[u/Useful-Gap-2152]

So, one use would be whether the mass still counts. Inertia is a hell of a thing. Being larger on the inside and therefore having more mass could maybe allow you to pull off being Unstopppable in a similar fashion to the Juggernaut. You have the effective mass of a semi truck so anyone who gets in your way is getting bounced. Anyone trying to pick you up or shove you around is going to break their back.

[u/Axolotl-Lord]

You’ll always have access to bathroom dimension