Spinal cord
From Wikipedia, the free encyclopedia. The spinal canal (or vertebral canal or spinal cavity) is the space in the vertebral column formed by the vertebrae through which the spinal cord passes. It is a process of the dorsal body cavity. This canal is enclosed within the vertebral foramen of the vertebrae. In the intervertebral spaces, the canal is protected by the ligamentum flavum posteriorly and the posterior longitudinal ligament anteriorly. The spinal cord, a major part of the central nervous system, is located in the vertebral canal and reaches from the base of the skull to the upper part of the lower back. The bones of the spine and a sac containing cerebrospinal fluid surround it.  Gross Anatomy. The spinal cord is located within the vertebral canal and extends from the foramen magnum to the rostral edge of the second lumbar vertebra (Figs. 9-1 and 9-2). The coverings (meninges) of the spinal cord. FIGURE 9-1 Cervical spinal cord 1 The autonomic nervous system is subdivided into the sympathetic nervous system which originates from the thoracic and lumbar regions of the spinal cord, and the parasympathetic nervous system which originates from the brain and the sacral part of the spinal cord. Myelinated axons which ascend and descend the spinal cord are located outside the central gray areas so that, The spinal cord is located within the vertebral column. It is separated from the inner bony surfaces of the vertebrae by an epidural space. The human nervous system is divided into the central nervous system (CNS) and the peripheral nervous system (PNS). The CNS, in turn, is divided into the brain and the spinal cord, which lie in the cranial cavity of the skull and the vertebral canal, respectively. The CNS and the PNS, acting in concert, integrate sensory information and control motor and cognitive functions. The spinal cord is an essential link between the peripheral nervous system and the brain; it conveys sensory information originating from different external and internal sites via 31 pairs of spinal nerves (Figure 1.5). The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column. The brain and spinal cord together make up the central nervous system (CNS). The spinal cord is the main pathway for information connecting the brain and peripheral nervous system. The length of the spinal cord is much shorter as compared to the length Figure 1.6. The central nervous system, which includes the spinal cord and the brain, is the most protected organ in the human body. It is protected from the external environment by three barriers: skull, meninges, and cerebral spinal fluid (CSF). The spinal cord is an essential link between the peripheral nervous system and the brain; it conveys sensory information originating from different external and internal sites via 31 pairs of spinal nerves (Figure 1.5). The spinal cord is the most important structure between the body and the brain. The spinal cord extends from the foramen magnum where it is continuous with the medulla to the level of the first or second lumbar vertebrae. It is a vital link between the brain and the body, and from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter. Two consecutive rows of nerve roots emerge on each of its sides. These nerve roots join distally to form 31 pairs of spinal nerves The structure that consists of dorsal and ventral roots within the lumbar region of the vertebral canal and the sacral canal (extending from the inferior end of the spinal cord) is the [blank]. cauda equina. 
https://en.wikipedia.org/wiki/Spinal_canal http://www.hopkinsmedicine.org/healthlibrary/test_procedures/neurological/lumbar_puncture_lp_92,P07666/ http://what-when-how.com/neuroscience/the-spinal-cord-organization-of-the-central-nervous-system-part-1/ http://www.aps.uoguelph.ca/~swatland/ch1_6.htm http://neuroscience.uth.tmc.edu/s2/chapter01.html https://en.wikipedia.org/wiki/Spinal_cord http://neuroscience.uth.tmc.edu/s2/chapter01.html http://neuroscience.uth.tmc.edu/s2/chapter03.html https://quizlet.com/16555630/nervous-tissues-flash-cards/
which part of the cns is located within the vertebral canal