Which term describes the position of a body part away from the midline?

The term that describes the position of a body part away from the midline is "lateral." In anatomical terminology, the midline is an imaginary vertical line that divides the body into equal right and left halves. When a structure is positioned laterally, it means that it is located further from this midline, typically toward the sides of the body.

For example, if you consider the arms, they are lateral to the torso, while the heart is medial to the lungs. Understanding this distinction is crucial for accurately describing the location of various anatomical structures and can be applied in clinical or educational contexts when referencing body parts and their relationships to each other.