Which plane divides the body into anterior and posterior segments?

The plane that divides the body into anterior (front) and posterior (back) segments is the frontal plane, also known as the coronal plane. This plane runs vertically down the body and is oriented perpendicular to both the sagittal and transverse planes. When an imaginary line slices through the body along the frontal plane, it creates a separation between the front part of the body (such as the chest and abdomen) and the back part (such as the spine and shoulder blades).

In contrast, the sagittal plane divides the body into left and right sections, while the transverse plane separates the body into upper (superior) and lower (inferior) parts. The mediolateral plane pertains to movements in a particular direction rather than serving as a division of segments, thus not fitting the description of separating anterior and posterior areas of the body. Understanding these planes is crucial in fitness training and anatomy as they provide a framework for describing movements and postures.