Updated June 3, 2014th
Back
The centerpiece is the spinal column that supports the weight of the upper body and houses and protects the spinal cord. Stacked more than 30 bones (vertebrae) that form the backbone or spine. Each of these bones has a circular opening, which, when stacked in alignment with each other to form a channel which surrounds the spinal cord.
Spinal cord
The spinal cord is from the base of the brain just below the rib cage. Small ribs (roots), and enter the spinal cord in the spaces between the vertebrae arise.
Horsetail
Because the bones of the spine continues to grow after the spinal cord reaches its full length in early childhood, the nerve roots in the lower back and legs extend many inches of the spine before leaving. This bundle of nerve roots called the cauda equina or "horse's tail".
Structures to
The spaces between the vertebrae include cartilage round mat called spongy discs, to permit flexibility in the lower back. Strips of tissue such as ligaments and tendons hold the vertebrae known on the spot and to the muscles of the spine stick.
Four regions
Starting at the top of the column has four areas:
The lumbar region of the back, where you will feel more pain, carries the weight of the upper body.
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