Which plane divides the body into left and right segments?

The sagittal plane is indeed the correct answer, as this anatomical plane divides the body into left and right segments. When a section is made along this plane, it runs parallel to the midline of the body, resulting in two halves that correspond to the left side and the right side. This division is fundamental in understanding body mechanics and movements that occur in this plane, such as flexion and extension, which are common in actions like bicep curls or squats.

In contrast, the frontal plane (also known as the coronal plane) separates the body into anterior (front) and posterior (back) sections, and the transverse plane divides the body into superior (upper) and inferior (lower) parts, neither of which creates the left and right divisions. Understanding the distinctions between these planes is essential for effectively analyzing movements and planning corrective exercise interventions.