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In the context of anatomy and physiology, lateral refers to a position or structure that is situated on the side of the body or an organ, away from the midline. It denotes a direction towards the sides, moving from the central axis of the body.
Medial refers to a position closer to the midline of the body or an organ.
Anterior indicates a position towards the front of the body.
Posterior denotes a position towards the back of the body