Which of the following is a part of the morphology (structure) of fish?

which is the study of how the component parts of fish function together in the living fish.[1] In practice, fish anatomyand fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish.