What is defined by the 'Subcostal line' in human anatomy?

The subcostal line is specifically defined as the superior horizontal line that connects the lowest costal cartilages. This anatomical reference point plays an important role in abdominal anatomy, as it delineates the boundary between the epigastric region and the left and right hypochondriac regions of the abdomen.

This line is situated just below the rib cage, and its significance lies in its utility for health professionals when assessing the underlying organs and structuring the abdomen into quadrants or regions for diagnosis and treatment. Its placement provides a reliable landmark for various medical procedures and examinations. Understanding the position and relation of the subcostal line to the surrounding anatomical features is crucial in the study of human anatomy and applies to clinical practices as well.