The left lumbar region is found in the abdominal cavity.
This area is one of the nine regions of the abdomen, specifically located in the left side of the middle zone. The abdominal cavity houses various vital organs, including those of the digestive system, such as the stomach, intestines, and kidneys. Understanding the anatomical layout helps in diagnosing abdominal pain and planning surgical procedures. The lumbar region itself is associated with the lower back area, but when referring to the abdominal layout, it specifically pertains to the left side of the torso in the region of the waist.