The sagittal plane is an anatomical term that refers to a vertical plane that divides the body into left and right sections. It runs parallel to the midline of the body, which is an imaginary line that runs down the center, creating symmetrical halves. Movements that occur in this plane include flexion and extension, such as bending and straightening the arm or leg. In human anatomy, the sagittal plane is essential for understanding body movements and positions. It is one of three primary anatomical planes, alongside the frontal plane and transverse plane. These planes help in describing the location of structures and the direction of movements in relation to the body.