The five bones of the backbone that are situated between the thoracic vertebrae and the sacrum, in the lower part of the back. They are the largest of the unfused vertebrae and have stout processes for attachment of the strong muscles of the lower back.
The lower back region of the human spinal column, situated below the level of the ribs, consists of a series of vertebrae. These vertebrae, known as the lumbar vertebrae, are an integral part of the spinal structure. They provide support and flexibility to the lower back, facilitating various movements and bearing the weight of the upper body. Understanding the role and positioning of the lumbar vertebrae aids in comprehending the significance of this region in maintaining proper spinal alignment and function.