Glossary
anatomical position
The anatomical position is the reference standing posture — upright, facing forward, arms at the sides with the palms facing forward — from which every directional term is defined.
The anatomical position is the reference posture anatomy uses so a direction means the same thing on every body and in every diagram: standing upright, facing forward, arms at the sides, with the palms facing forward. Every directional term is read from that pose and from the body's point of view, never the reader's. Superior is toward the head and inferior toward the feet; anterior (ventral) is toward the front and posterior (dorsal) toward the back; medial is toward the midline and lateral away from it; proximal is nearer the point where a limb joins the trunk and distal is farther along the limb; superficial is nearer the surface and deep is farther in. The word a question uses is the word to answer with: a structure nearer the trunk is proximal, and calling it superior is a claim about a different direction.
Taught in
Source: OpenStax, Anatomy and Physiology, 1st edition (CC BY 4.0), sections 1.2, 1.6, 22-24 and the respiratory, cardiovascular, digestive, nervous, muscular and immune chapters. Each definition explains the Human anatomy and physiology guide in this exam, which carries the per-source citations on its own page. (OpenStax Anatomy and Physiology 1e, accessed 2026-10-08)