To reduce any health risks, problems, and absolutely entwine her with the Bane systems, as well as to surrender even more of her humanity to her new existence, Alexandra’s heart is removed and replaced with an artificial device. The device is under absolute control by Lumina, and it performs as a perfect heart, but also injects the oxygen from Alexandra’s air tank into her blood. The remaining CO2 coming in from the bloodstream is removed and with the combination of water is made into Glucose, as well as a little more oxygen, similar to how photosynthesis works. This way, all the CO2 from Alexandra’s body is recycled into oxygen and sent into her bloodstream again.
This artificial heart significantly symbolizes how Lumina has become the very core of Alexandra’s existence, as the AI is now embedded within Alexandra’s womb, and has quite literally become her heart.
The artificial heart is a separate device from the power supply, as it only acts as a combination of Alexandra’s heart and lungs.
The synthetic heart pumps differently than a human one, and instead results in a constant stream, instead of pulses. This leaves a very odd sensation, as no pulse of her blood is actually present any more in Alexandra’s body. With the combination of no pulse, and not breathing, as well as being unable to make any sounds with her missing vocal cords and sealed nose, Alexandra becomes a completely silent and still Bane. Alexandra has no pulse.