Final answer:
Digit number IV, the ring finger, is lateral to digit number III, the middle finger, meaning it is further from the midline of the body when compared to digit number III.
Step-by-step explanation:
When using directional terms in anatomy, we describe the position of body parts relative to each other. Anatomy is the science that studies the structure of the body. On this page, you'll find links to descriptions and pictures of the human body's parts and organ systems from head to toe. The phrase Digit number IV is lateral to digit number III means that digit number IV (the ring finger) is further away from the midline of the body, or the imaginary line that runs down the center of the body vertically, compared to digit number III (the middle finger). If you were holding your hand in front of you with the palm facing upwards, digit number IV would be to the side of, or literally to the right of, digit number III in the left hand, or to the left of digit number III in the right hand.