In this article, I foreground the physiology of phantasia in Aristotle, which has been comparatively understudied. In the first section, I offer a new interpretation of the relationship between aisthēmata and phantasmata, based on passages in the De Anima and the Parva Naturalia, and for a nuanced understanding of their respective substrates in the body, which I argue to be connate pneuma and blood. In the second section, I draw out the ramifications of this physiological presence of phantasmata in the (...) blood and compare the integration of phantasmata into a person or animal’s experiential history with the process of digestion. Both processes, I contend, require internalization of foreign elements as well as their optimal organization; more strikingly, both processes occur in the same substance, in the same location, and, perhaps, at the same time. (shrink)

The soul is an explanatory principle of Aristotle’s natural science, accounting both for the fact that living things are alive as well as for the diverse natural attributes that belong to them by virtue of being alive. I argue that the explanatory role of the soul in Aristotle’s natural science must be understood in light of his view, stated in a controversial passage from Parts of Animals (645b14–20), that the soul of a living thing is a “complex activity” of its (...) organic body. This paper explores the role of this “complex activity” model of soul in Aristotle’s study of soul in De Anima. I argue, first, that the model has its origins in De Anima II.4, where Aristotle argues that living things do all they do by nature for the sake of a single, teleologically primary end. I argue further that Aristotle uses this model to account for the psychological attributes naturally present in living things, including their capacities for vital activities like nutrition, reproduction, and perception, and that this is the task to which Aristotle devotes the obscure final chapters of De Anima III. (shrink)