Body Planes and Sections When preparing to look at the internal structures of the body, medical students find it necessary to make a section, or cut. When the section is made through the body wall or through an organ, it is made along an imaginary line called a plane. Since the body is three-dimensional, we can refer to three types of planes or sections that lie at right angles to one another (Figure 1.6). A sagittal (saj-˘ı-tal) section is a cut made along the lengthwise, or longitudinal, plane of the body, dividing the body into right and left parts. If the cut is made down the median plane of the body and the right and left parts are equal in size, it is called a midsagittal, or median, section. A frontal section is a cut made along a lengthwise plane that divides the body (or an organ) into anterior and posterior parts. It is also called a coronal (ko-ro-nal) section. A transverse section is a cut made along a horizontal plane, dividing the body or organ into superior and inferior parts. It is also called a
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