Which body plane cuts the body into right and left sides (does not have to be equal)?

The body plane that divides the body into right and left segments, regardless of whether these segments are equal, is indeed the sagittal plane. This plane runs vertically, parallel to the midline of the body, allowing for separation into two sides.

The median or midsagittal plane is a specific type of sagittal plane that divides the body into equal right and left halves, but the general term "sagittal plane" encompasses any vertical cut that creates two sections on either side of the body, which does not necessarily need to be equal. Thus, the answer correctly reflects that the sagittal plane can refer to any division into right and left segments.

Understanding these distinctions is crucial because they help in anatomical positioning and the communication of locations and directions in the body. The frontal (coronal) plane divides the body into anterior (front) and posterior (back) sections, while the transverse plane divides it into superior (upper) and inferior (lower) portions, neither of which addresses right and left division.