What term describes a structure located toward the midline of the body?

The term that describes a structure located toward the midline of the body is "medial." In anatomical terminology, "medial" refers to the position of a body part or structure being closer to the center of the body compared to another structure. For instance, the nose is medial to the cheeks, as it is closer to the midline of the face.

Conversely, "lateral" refers to a position farther from the midline; "proximal" indicates a structure closer to the point of attachment or origin, commonly used to describe limbs; and "distal" means farther from the point of attachment or origin, also typically used for limbs. Understanding these directional terms is essential for accurately describing the locations of different parts of the body in relation to one another.