The sagittal plane divides the body into what?

The sagittal plane is specifically defined as the anatomical plane that divides the body into right and left sections. This division can be equal, creating a mid-sagittal plane, or it can be off-center, resulting in a para-sagittal plane. This distinction is important in medical contexts, as it helps to describe locations and movements of structures within the body based on their relationship to the sagittal division. Understanding the sagittal plane is essential for various practical applications, including medical imaging and physical assessments, as it allows healthcare professionals to visualize and describe where certain structures or abnormalities are located in relation to these divisions.

The other choices refer to different anatomical planes: the upper and lower segments are divided by the transverse (horizontal) plane, the front and back segments are divided by the coronal plane, and internal and external regions pertain more to anatomical layers rather than being defined by a specific plane.