Changes

Added: Lungs are now fully modular and actually process gas for humans. Lungs must be compatible with a species or they will die of suffocation.
Added: Vox and Plasmamen have their own lungs. These alien lungs are not available at organ printers, requiring stockpiling from donor monkey-humans.
Added: All species currently exhale CO2. Vox may be tweaked later to exhale N2O.
Added: Robotics can make Advanced Lungs (programming 2, biomech 4), which are compatible with all species and filter out some gasses (N2O and plasma), up to certain partial pressures.

Sprites

Lungs:

Eyes: