What is the spine? and parts of the column

Definition of spine and characteristics of the various parties. 

The spine is located in the midline and the posterior part of the body. It extends from the base of the head, runs neck, thorax and abdomen in the rear and ends at the pelvis or hip.

Image of the spine and Definition 

The spine has several parts: 

1. The cervical part, which is the neck, and is made up of seven vertebrae.
2. The dorsal area is part of the thorax, and has 12 vertebrae.
3. The lumbar part, corresponding to the abdomen, and has 5 vertebrae.
4. Sacred party is composing a hip and has 5 vertebrae welded together and form a single bone called the sacrum.
5.-coccygeal part, is a vestige of tail is formed by 3 or 4 rudimentary vertebrae.

All vertebrae are like each other, but vary in size and shape. These variations are noticeable from one region to another.
It is important to know that the spine is the support base of the upper skeletal structure. Besides his medulla duct or canal allows passage of the spinal cord.

The spinal cord is the prolongation of the brain and nervous system is the way of departure and arrival of the nerve fibers from the brain to the organs, or organs to the brain.
The weight of the column has to endure is greater than the lower segments, so the body of the vertebrae is greater as occupying a lower place.

The spinal cord is thicker in the upper parts, because it has more fiber. In the lower segment thins because they go out nerve fibers to the organs. Therefore vertebral canals upper vertebrae are broader than those of the lower vertebrae