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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of a vertebrate in which the notochord (a flexible rod of uniform composition) found in all chordates has been replaced by a segmented series of bone: vertebrae separated by intervertebral discs.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.merriam-webster.com/dictionary/backbone

back· bone | \-ˈbōn, -ˌbōn \ Medical Definition of backbone. 1: spinal column, spine. 2: the longest chain of atoms or groups of atoms in a usually long molecule (as a polymer or protein) Keep scrolling for more. More from Merriam-Webster on backbone. Rhyming Dictionary: Words that rhyme with backbone.

mayfieldclinic.com/PE-AnatSpine.htm

Anatomy of the Spine Overview. The spine is made of 33 individual bones stacked one on top of the other. This spinal column provides the main support for your body, allowing you to stand upright, bend, and twist, while protecting the spinal cord from injury.

www.innerbody.com/image/skel05.html

Sacral: The sacral region of the spine contains only the sacrum, a single bone in the adult skeleton that is formed by the fusion of 5 smaller vertebrae during adolescence. The sacrum is a flat, triangular bone found in the lower back and wedged between the 2 hip bones.

www.collinsdictionary.com/dictionary/english/backbone

Backbone definition: Your backbone is the column of small linked bones down the middle of your back. | Meaning, pronunciation, translations and examples

www.spine-health.com/conditions/arthritis/bone-spurs-osteophytes-and-back-pain

Many patients are told that they have bone spurs in their back or neck, with the implication that the bone spurs are the cause of their back pain. However, bone spurs in and of themselves are simply an indication that there is degeneration of the spine; the presence of bone spurs does not necessarily mean that they are the actual cause of the ...

en.wikipedia.org/wiki/Vertebra

In the vertebrate spinal column, each vertebra is an irregular bone with a complex structure composed of bone and some hyaline cartilage, the proportions of which vary according to the segment of the backbone and the species of vertebrate. The basic configuration of a vertebra varies; the large part is the body, and the central part is the centrum.

www.innerbody.com/image_diagram/skel18.html

The bones of the pelvis and lower back work together to support the body’s weight, anchor the abdominal and hip muscles, and protect the delicate vital organs of the vertebral and abdominopelvic cavities. The vertebral column of the lower back includes the five lumbar vertebrae, the sacrum, and the coccyx. These bones work together to provide ...

www.answers.com/Q/How_many_bones_are_in_the_spine

Answer: There are between 31-33 bones that make up the spine called the vertebral column. The difference is in the coccygeal bones, which some times are counted as two, three, or four separate bones.

www.sharecare.com/health/parts-of-the-skeletal-system/what-is-backbone

What is the backbone? Honor Society of Nursing (STTI) The backbone is made up of the bones, muscles, tendons, and other tissues that reach from the base of the skull to the tailbone. The backbone encloses the spinal cord and the fluid surrounding the spinal cord. The backbone is also called the spinal column, spine, and vertebral column.