What is the process of methodically cutting up a body or plant to study its internal parts called?

The process of methodically cutting up a body or plant to study its internal parts is known as dissection. This term specifically refers to the careful and systematic cutting of an organism to observe and understand its anatomical structure and function. Dissection is often used in educational and scientific contexts to provide insight into biological systems.

The term analyze generally refers to breaking down information or data into smaller parts to understand it better, but it does not imply the physical act of cutting. Examine and inspect involve looking at or reviewing something carefully, but again, they lack the specific connotation of physical separation of parts that dissection entails. Thus, dissection is the most accurate and precise term for this particular process.