Final answer:
The right lumbar region, as part of the nine-region division of the abdomen, is commonly referred to as Region 2. It is one of the abdominal regions, not to be confused with the lumbar vertebrae which are numbered L1-L5.
Step-by-step explanation:
The right lumbar region is the area of the lower back on the right side of the body. This area pertains to the anatomical division of the abdomen into regions for medical reference and is not directly numbered by the lumbar vertebrae (L1-L5) of the vertebral column.
However, when discussing the nine-region division of the abdomen, the right lumbar region is commonly referred to as Region 2. To clarify, Region 1 corresponds to the right hypochondriac region, Region 2 is the right lumbar region, and Region 3 is the right iliac or inguinal region, as you move from the top to the bottom in the right column of the abdomen.