This paper explores the anatomical foundations of Aristotle's natural
philosophy. Rather than simply looking at the body, he contrives speci
fic procedures for revealing unmanifest phenomena. In some cases, thes
e interventions seem extensive enough to qualify as experiments. At th
e work bench, one can observe the parts of animals in the manner Arist
otle describes, even if his descriptions seem at odds with 20th centur
y textbooks. Manipulating animals allows us to recover his teleologica
l thought more fully. This consideration of Aristotle as a sophisticat
ed biologist helps our reading of his writings in other areas of philo
sophy.