What is the term for the lower back region of the body?

The term that refers to the lower back region of the body is "lumbar." This area is characterized by five vertebrae (L1 to L5) that support much of the upper body's weight and provide flexibility and movement to the torso. The lumbar region is crucial for maintaining posture and facilitating various physical activities, such as bending and lifting.

The thoracic region, which is located above the lumbar area, pertains to the upper back where the ribs are attached, providing a different function in terms of ribcage stability and protection for the thoracic organs. The pelvic region is lower than the lumbar region and is associated with the hip bones and the structures of the lower abdomen. The gluteal region refers to the muscles and tissues in the buttock area that assist in leg movement and support. Understanding these anatomical distinctions helps clarify why "lumbar" is the appropriate designation for the lower back specifically.