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A real anatomical model, not to scale. Verify exact anatomy against your course materials.
The Rule of Nines is a quick field method for estimating total body surface area (TBSA) affected by a burn in an adult, dividing the body into regions that are each roughly 9% (or a multiple of 9%): head & neck 9%, each arm 9%, the entire front torso 18%, the entire back torso 18%, each leg 18%, and the groin 1%.
A rough estimate to guide severity and transport. A child’s proportions differ: the head and neck is 18% and each leg 13.5%; the rest is counted as in an adult. For small or scattered burns, the patient’s own palm (fingers included) is about 1%.