Which term describes the anatomical plane that separates the body into right and left halves?

The term that describes the anatomical plane separating the body into right and left halves is known as the sagittal plane. The sagittal plane runs vertically and divides the body into two mirror-image halves: one side being the right side and the other being the left side. When the sagittal plane runs directly down the center of the body, it is sometimes referred to as the mid-sagittal or median plane.

While the term midline is often used informally to refer to this concept, in anatomical terminology, the specific term that accurately identifies this separation is the sagittal plane. Other planes, such as the coronal plane and the transverse plane, serve different purposes; the coronal plane divides the body into anterior (front) and posterior (back) sections, and the transverse plane separates the body into superior (upper) and inferior (lower) parts.