Which plane divides the body into right and left portions?

The plane that divides the body into right and left portions is known as the sagittal plane. This anatomical plane runs vertically, creating a division that separates the body into two symmetrical halves along the midline. Any movement or activity that occurs in this plane can involve flexion and extension, typically exhibited during exercises like bicep curls or leg raises.

In contrast, the frontal plane (also referred to as the coronal plane) divides the body into anterior (front) and posterior (back) portions, which is essential for lateral movements, while the transverse plane separates the body into superior (upper) and inferior (lower) halves, important for rotational movements. Therefore, it is clear that the sagittal plane's defining characteristic is its ability to split the body into right and left sections, making it the correct option.