Which plane runs vertically but is not necessarily in equal halves?

The sagittal plane runs vertically and divides the body into left and right sections. However, unlike the frontal plane, which divides the body into anterior and posterior sections, the sagittal plane may not cut the body into equal halves; it can create an asymmetrical division depending on where the line is drawn. For instance, a sagittal plane that divides a person slightly to the left of the midline would create two unequal halves.

The other planes mentioned have different orientations and purposes. The frontal plane divides the body into anterior and posterior parts, the vertical plane typically refers to any plane oriented vertically, and the transverse plane cuts the body into upper and lower sections, which doesn't pertain to a vertical division at all. Thus, the sagittal plane is the one that aligns with the description of running vertically without the requirement of creating equal halves.