2. The positions of cervical vertebra, thoracic vertebra and lumbar vertebra are all under the head.
3. Spinal nerves and blood vessels pass through cervical, thoracic and lumbar vertebrae.
Related introduction:
1, cervical spine:
Located under the head and above the thoracic vertebrae. Located in the neck of the spine, there are 7 blocks around the cervical spinal cord and its spinal membrane. Connected by intervertebral disc and ligament, it forms a physiological bend that protrudes forward. The characteristic of cervical vertebra is that the vertebral body is small and oval, and the transverse process has transverse process holes.
2. Thoracic vertebrae:
Located in thoracic vertebra, *** 12. From top to bottom, the vertebral body gradually increases, which is related to bearing. The thoracic vertebrae are involved in supporting the ribs and forming the thoracic cavity.
3. Lumbar vertebrae:
The vertebral body is high, high in the front and low in the back, showing a kidney shape. Vertebral foramen is large and triangular, larger than thoracic vertebra and smaller than cervical vertebra. The articular process is sagittal, the articular surface of the superior articular process is concave, and the articular surface of the inferior articular process is convex, and it is forward and lateral.
Extended data
The upper end of the spine supports the skull, the lower part is connected with the hip bone, and the middle part is attached with ribs, which serve as the back wall of the thorax, abdominal cavity and pelvic cavity. The spine has the functions of supporting trunk, protecting internal organs, protecting spinal cord and exercising. A longitudinal spinal canal is formed inside the spine from top to bottom, and there is a spinal cord in it (note: the spine is not equal to the spine or vertebrae, and the spine is composed of multiple vertebrae).
Between the front and back of the spine is the spinal canal, which contains the spinal cord. When the surrounding bony structures such as vertebral body, vertebral arch and lamina invade the spinal canal due to fractures or other diseases, it can cause spinal cord compression and even paraplegia, with only a small amount of bleeding and granulation tissue.
Baidu encyclopedia-cervical vertebra
Baidu encyclopedia-thoracic vertebrae
Baidu encyclopedia-lumbar vertebrae