Apollo represented the gall, Dionysus the spleen, Demeter the liver, and so on. Splanchna receive the image-impress of gods. They reflect what gods want to be.
Padel documents the archaic Greek allegorical-extispicic tradition in which gall is identified with Apollo, situating the substance within a system whereby innards are the site of divine presence and communication.
, In and Out of the Mind Greek Images of the Tragic Self, 1994thesis