Final answer:
The directional term for 'back' or 'behind' in anatomy is 'posterior' or 'dorsal', used to describe a position towards the back of the body.
Step-by-step explanation:
The directional term that refers to 'back' or 'behind' in the context of the human body is posterior or dorsal. This terminology is used to describe the relative locations of body structures.
For instance, in an anatomical perspective, the popliteus muscle is posterior to the patella, meaning it is located towards the back of the body compared to the patella.
Understanding these terms is crucial in fields like medicine and biology, where precise descriptions of body structures and their locations are necessary.