Final answer:
A horizontal section through the body is known as a transverse plane, which divides the body or organ into upper and lower portions.
Step-by-step explanation:
A horizontal section through the body is called a transverse plane. The transverse plane divides the body or organ horizontally into upper and lower portions. This plane is perpendicular to the sagittal planes and the long axis of the body and is sometimes referred to as a cross section. When the transverse cut is at an angle, it is known as an oblique plane. Other planes include the frontal (coronal) plane, which divides the body into anterior and posterior sections, and the sagittal plane, which divides the body vertically into right and left sides. A midsagittal plane would make two equal right and left halves, while a parasagittal plane would divide the body into unequal right and left