(1) nine region plan: by means of four imaginary planes, two of which are horizontal (indicated by lines drawn across the right and left 10" ribs and across the right and left anterior superior iliac spines) and two sagittal (indicated by lines drawn from mid point of inguinal ligament to nipples of chest, right and left sides). Upper row- right hypochondriac, epigastric, left hypochondriac. Middle row - right lumbar, umbilical, left lumbar. Lower row - right inguinal (iliac), hypogastric, left inguinal (iliac). (2) Four region plan: by means of imaginary planes, one horizontal and the other mid-sagittal. Upper right quadrant, upper left quadrant, lower right quadrant, lower left quadrant.