Which part of the vertebral column contains 5 vertebrae?

The lumbar region of the vertebral column is specifically characterized by having five distinct vertebrae, labeled as L1 through L5. This area is located in the lower back, and it plays a crucial role in supporting much of the body's weight, providing stability, and facilitating movement. Due to the broader size and strength of these vertebrae, the lumbar region can withstand significant forces that occur during activities such as lifting and carrying.

In contrast, the coccyx consists of a few fused vertebrae (typically four), serving as the tailbone and providing attachment points for ligaments and muscles. The sacral region also consists of fused vertebrae (usually five) that form the sacrum, connecting the spine to the pelvis. Lastly, the thorax contains twelve thoracic vertebrae, which are associated primarily with the ribs and the thoracic cavity. Therefore, recognizing the lumbar region as the section with five individual, non-fused vertebrae is essential for understanding human anatomy and functional biomechanics.