Final answer:
Anatomy studies the structure of living organisms, while physiology examines their functions, with a focus on maintaining homeostasis.
Step-by-step explanation:
The best description of the main concepts associated with the study of anatomy and physiology is that anatomy focuses on the structure of living organisms, while physiology focuses on their functions. Anatomy investigates the body's structures, which has traditionally been learned through observation, injury study, dissection, and now advanced imaging techniques. Physiology, on the other hand, is the scientific study of how these structures work together, including the physical and chemical processes that maintain life, such as homeostasis, the state of steady internal conditions. Together, these fields are interrelated, as understanding body function helps explain why structures are the way they are, and studying body structures can shed light on potential functions.