The punishment for Prometheus stealing fire from the Gods and gifting it to humanity, was to be chained to a rock and having an eagle feed on his liver which would regrow the next day.
For what it's worth, Prometheus was a Titan, and Titan was immortal, so his liver regrowing the next day wasn't really that special. If eagle fed on his heart, or lungs, they would've regrown too.
The Greeks chose liver because it symbolized the defiance Prometheus had against gods.
I'm thinking the Greeks chose liver because it is the first thing that many predators will eat from a kill - large, more nutrient-dense than almost any other tissue, and relatively quick to access.
vconnor · · focus · HN ↗
bheadmaster · · focus · HN ↗
The Greeks chose liver because it symbolized the defiance Prometheus had against gods.
bell-cot · · focus · HN ↗