What is the study of an organism's structure called?

The study of an organism's structure is known as anatomy. Anatomy focuses on the physical structure of organisms, including the arrangement of various parts such as organs, tissues, and cells. It provides insights into how these structures relate to one another and function within a living organism. This discipline is fundamental in fields such as medicine, biology, and health sciences because understanding the structure of an organism is crucial for making diagnoses, performing surgeries, and conducting research.

Biology is a broader field that encompasses the study of living organisms and their interactions but does not specifically focus on structure alone. Physiology pertains more to the functions and processes of biological systems rather than their structures. Histology, while it deals with the microscopic structure of tissues, is a subset of anatomy and focuses specifically on tissues rather than the overall anatomical organization of an organism. Thus, anatomy is the most accurate term to describe the study of an organism's structure.