>>5263048>and just shoving the brain and any relevant organs into the chest cavity.This made me remember many shows where this trope is used.
One being Shapes from texhnolyze. Essentially your head is whole but the rest is compated into a cocoon. See pic related, the brown thing at the center is what I am talking about.
Another boring mention is
https://www.youtube.com/watch?v=UFuxiZFwDPs robocop 2014. I call it boring because the housing of the organs is built around them, without attempting to reduce them in size and shove them in a compact canister? I would get rid of the left ventricle and atrium because there is no body to pump blood into. The right side could easly circulate blood into the lungs for gas exhange and the remaining cardiac output would go into the brain and hand. Since the head is a metal case I would easly regulate the intracranial pressure so it's very very easy to get blood going and bypassing the siphons too...
ah! honorary menton to Prushka Soup 