The "Lumbar" section of the back consists of the five lowest vertabre in the back.
(These happen to be above the Sacrum and Coxyx).
The lumbar region of the vertebral column contains 5 vertebrae (the bones of the spine).
Thoratic
The lumbar section of a typical human spine contains five vertebrae, known as L1 to L5.
Cows have 13 thoracic and 6 lumbar vertebrae. If you consider the backbone as composed of the cervical, thoracic, and lumbar vertebrae, there would be a total of 24 vertebrae.
The vertebrae consist of the vertebral body, spinous process, transverse process, and articular processes. There are 33 vertebrae in total, including 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae (fused into the sacrum), and 4 coccygeal vertebrae (fused into the coccyx).
The sacrum, which consists of 5 fused bones, and the coccyx are below the lumbar vertebrae in the spine.
There are seven cervical (neck) vertebrae, 12 thoracic (the majority of the back) vertebrae, and five lumbar (lower back) vertebrae.
7 cervical vertebrae + 12 thoracic vertebrae + 5 lumbar verterbae + 5 sacral vertebrae + 4 caudal vertebrae = 33
The spinal column is made of 31-33 bones, some of which are fused. There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral and 2-4 coccogeal vertebrae.
There are typically five lumbar vertebrae.
The human adult vertebral column consists of 26 bones. There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, and 2 that are collections of fused bones, the sacrum and the coccyx. An infant may have 32, 33, or 34 spinal bones present at birth.
Cervical Thoracic Lumbar Sacral Coccyx