I saw this pic a while ago and ever since have been wondering; is it possible to keep a head alive by connecting the arteries in it's neck to the arteries in the arm or leg of another person with the same blood type?
The blood would be oxygenated after all, but would the blood flow be enough to keep the brain conscious? Or would the arteries in the arms/legs not be sufficient to pump blood to a brain? If they are sufficient, then hypothetically could the head be kept alive indefinitely just living off the oxygenated blood and nutrients from the host body?
Obviously the head wouldn't be able to talk due to the lack of lungs or vocal chords, but the idea of someone being a mute head hand could make for decent existential body horror.