What describes the mid-sagittal plane?

The mid-sagittal plane specifically refers to a vertical plane that divides the body into equal right and left halves. It runs through the midline of the body, ensuring that both sides are mirrored. This anatomical plane is essential for understanding body orientation and movement in a symmetrical context.

The other options describe different anatomical planes: the option that divides the body into front and back refers to the coronal plane, while the one that divides the body into upper and lower parts corresponds to the transverse plane. The option that indicates division along multiple axes doesn't accurately describe any specific anatomical plane, making it irrelevant in this context. Thus, the description of the mid-sagittal plane aligns perfectly with the correct answer, emphasizing its role in creating two symmetrical sides of the body.