Any vertical line passing through the body that is parallel to the long axis of the body This plane runs from anterior to posterior. A mid-sagittal plane bisects the body into to equal halves. The mid-sagittal plane is also referred to as a median plane. A line passing through the body at right angles to the median plane divides body into anterior and posterior portions. A line passing through the body at right angles to both median and coronal planes.
Line is parallel to the ground in anatomical position.
Example, this plane connects the left and right ankle joints. The axis of movement in a joint occurs at right angles to the plane of movement of the body segment around that joint. Typically, most joints move around some primary axis. Frontal-horizontal axis . Movement about a line is parallel to the ground.