The three planes of the body are the sagittal plane, the coronal plane, and the transverse plane. These planes are imaginary reference points that divide the body into various sections in order to help describe relative anatomy.  The sagittal plane is a vertical plane that travels down the middle of the human body and divides the body into right and left portions. The coronal plane runs vertically through the side of the body, dividing it into the front of the body (anterior) and the back of the body (posterior). The transverse (or axial) plane runs horizontally, separating the top half of the body from the bottom half.