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www.teachpe.com/anatomy/the_spine.php

The 5 sections of the spine or vertebral column are the cervical, thoracic, lumbar and sacrum which includes the coccyx. Cervical spine makes up the neck and has 7 vertebrae. The top two bones are known as the atlas and axis and are different from the others to allow rotation of the skull as well as forwards and backward.

simple.wikipedia.org/wiki/Spine

The spine is a column of vertebrae in the back part of the torso (upper body). It is also called the backbone or vertebral column.There is a spinal canal that runs through the length of the spine. Inside this canal is the spinal cord.Animals that have a spine are called vertebrates, and animals that do not have one are called invertebrates.Humans have a spine, so we are vertebrates.

www.spine-health.com/.../spine-anatomy/normal-spinal-anatomy

Lumbar spine (lower back) - typically including 5 vertebrae (known as L1 to L5), which have a great deal of motion and flexibility. Because this section of the spine bears most of the body’s weight and allows for the most motion (which stresses the anatomical structures), this is the area associated with most back problems.

www.healthhype.com/parts-of-the-spine-anatomy-picture...

This section is made up of 12 vertebrae (abbr. T1 to T12) and are the chest back bones of the spinal column. The normal curvature is ‘outwards’ (kyphosis). Lumbar Vertebrae. These are the ‘fattest’ of the vertebrae due to the big body of each bone and this section is made up of 5 vertebrae (abbr. L1 to L5).

www.scoi.com/specialties/spine-doctor/anatomy-spine

The normal anatomy of the spine is usually described by dividing up the spine into three major sections: the cervical, the thoracic, and the lumbar spine. (Below the lumbar spine is a bone called the sacrum, which is part of the pelvis). Each section is made up of individual bones, called vertebrae.

www.answers.com/Q/What_are_the_five_sections_of_the_spine

The spine is composed of 24 different bones called vertebrae, 7 in your neck, 12 in your upper to mid back, and 5 in your low back. Â The upper to mid back vertebrae are called thoracic vertebrae ...

mayfieldclinic.com/PE-AnatSpine.htm

The spinal nerves are numbered according to the vertebrae above which it exits the spinal canal. The 8 cervical spinal nerves are C1 through C8, the 12 thoracic spinal nerves are T1 through T12, the 5 lumbar spinal nerves are L1 through L5, and the 5 sacral spinal nerves are S1 through S5. There is 1 coccygeal nerve.

en.wikipedia.org/wiki/Vertebral_column

The vertebral column, also known as the backbone or spine, is part of the axial skeleton. The vertebral column is the defining characteristic of a vertebrate in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bone: vertebrae separated by intervertebral discs.

www.verywellhealth.com/parts-of-the-spine-4020331

Spinal nerves arise from the spinal cord at each level. They first branch into spinal nerve roots (already discussed) and then further subdivide into nerves that go to all parts of the body to pick up sensory information and relay that to the brain, as well as deliver movement instructions and impulses from the brain to the muscles.

www.healthline.com/human-body-maps/lumbar-spine

The muscles of the lower back help stabilize, rotate, flex, and extend the spinal column, which is a bony tower of 24 vertebrae that gives the body structure and houses the spinal cord.