Physiology: Body: Lower: Digestion
	Liver converts food into humours Humours generate "vital heat," which are mediated to the body by 3 kinds of spirit Natural spirits l Vapor formed in the liver, carried with humours through veins Vital spirits l Heart acts on natural spirits using heat and air of lungs, carrying life and heat through the arteries using a nobler kind of blood Animal spirits l Vital spirits are carried to the brain, where they partake of the body and soul.