Final answer:
The human body needs to be split along the sagittal plane to produce two mirror halves.
Step-by-step explanation:
The human body needs to be split along the sagittal plane in order to produce two mirror halves. The sagittal plane is the plane that divides the body vertically into right and left sides. If the vertical plane runs directly down the middle of the body, it is called the midsagittal or median plane.