Which of the following statements is NOT true about the sagittal plane?

The sagittal plane is a vertical plane that divides the body into left and right portions. A sagittal section specifically focuses on this division, allowing for the examination of structures relative to their left and right positioning. Therefore, statements about the sagittal plane correctly emphasize its function in creating a vertical cut.

The first statement appropriately describes a sagittal section as a cut made along the vertical plane, which aligns with the definition of the sagittal plane. The fourth statement accurately states that such a section separates the body into left and right parts, reflecting the essential characteristic of this anatomical plane.

However, the statement regarding a sagittal section being a cut made along the horizontal plane is inaccurate. The horizontal plane, also known as the transverse plane, divides the body into superior (upper) and inferior (lower) parts, contrasting with the primary function of the sagittal plane. This distinction highlights the specific role of the sagittal plane in anatomical terminology, confirming why the third statement is not true.