As an undergraduate physiology major, an a current graduate student in the area of Physiology, I will say the only course I have taken in 7 years of academia where I felt I was at a disadvantage for not having taken Anatomy, was histology. Anatomy introduces an EXTENSIVE amount of detail, a considerable amount of which bears no relevance to function, i.e. no relevance to physiology. Any anatomy that you need to understand a given concept in physiology is typically presented along side the functional information. I'd say pick one or the other. Doesn't matter if you take A before B or B before A in this case, honestly.
Source: I am a physiologist.