Which plane best describes dividing the body into anterior and posterior portions?

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Dividing the body into front and back is done by the frontal (coronal) plane. This vertical plane runs from head to feet and passes through the body to separate anterior (front) from posterior (back) regions. The terms “frontal” and “coronal” are two names for the same plane, with “frontal” chosen here to emphasize the front-back orientation. For contrast, the sagittal plane splits left from right, and the transverse plane splits top from bottom.