The science that studies the general structure of an organism is anatomy.

Here's a breakdown:

* Anatomy: Deals with the identification and description of the body structures of an organism. It explores the organization, form, and relationships of various parts.

* Physiology: Studies the functions of the body and its parts.

So, while both anatomy and physiology are crucial for understanding living organisms, anatomy focuses on the what (structure), while physiology focuses on the how (function).