Final answer:
The transverse plane is perpendicular to the longitudinal axis of the human body, dividing it into upper and lower portions.
Step-by-step explanation:
The type of plane that runs perpendicular to the longitudinal axis of the human body is the transverse plane. This plane divides the body into upper and lower portions, separating it horizontally.
An example is when an MRI or CT scan produces images called cross sections, which are essentially images of the body as seen from a transverse cut. In contrast, the frontal plane (also called coronal plane) divides the body into anterior and posterior sections, and the sagittal plane divides the body vertically into right and left sides.