How is the anatomy of a body part related to its physiology?

Anatomy is the study of the body and it's structures and physiology is the study of the function of those structures as it relates to the body. Anatomy without physiology would leave us with no answers as to how the body functions. Physiology would not exist without anatomy because there would not be any structures so there would be no need to explain how they function. Neither would be complete without the other.