Which term indicates a position toward the back of the body?

The term "posterior" is used in anatomy to describe a position that is toward the back of the body. It is a directional term that helps in explaining the relative positions of different structures in the body. For instance, the heart is posterior to the sternum, meaning it lies behind the breastbone. This term is essential for understanding human anatomy and orientations, particularly in medical contexts.

In contrast, the other terms relate to different positional references in anatomy. "Medial" refers to a position that is closer to the midline of the body, indicating a more centralized location. "Superficial" describes structures that are situated closer to the surface of the body, contrasting with deeper structures. "Superior" denotes a position that is above another structure, indicating a vertical orientation rather than a back-to-front orientation. Thus, "posterior" is the correct term when discussing positions that are relative to the back of the body.