According to the location of the nerve in and out of the spinal canal, the spinal cord can be divided into ( ). A: Cervical spinal cord B: Thoracic spinal cord C: Lumbar spinal cord D: Sacral spinal cord E: Caudal spinal cord

A spinal segment is defined as region of the spinal cord that A: corresponds to a collection of nerves passing up or down within the white matter B: corresponds to the region of the vertebral column (i.e. cervical, thoracic, lumbar, and sacral) to which spinal nerves arise C: refers to a region of the spinal cord from which a pair of spinal nerves arises D: underlines the neural arch of a particular vertebra in the adult