| A | B |
|---|
| Total number of pairs | 31 |
| Two main functions | transmit impulses to and from brain - integrating center for spinal cord reflexes |
| Beginning; end | foramen magnum; between 1st and 2nd lumbar vertebrae |
| gray matter in spinal cord contains this | cell bodies of motor and mixed neurons |
| white matter gets the "whiteness" from this | myelin |
| central canal contains this | CSF |
| central canal is continuous with these structures | spinal cord and ventricles in the brain |
| The 8 cervical pairs of spinal nerves supply these areas | back of head, neck, shoulders, arms, and the diaphragm |
| The 12 thoracic pairs of spinal nerves supply these areas | 1st one helps supply the arms; the remaining supply the trunk of the body |
| The 5 lumbar and 5 sacral pairs of spinal nerves work together to supply these areas | hips, pelvic cavity, and legs |
| What is special about the 1 coccygeal pair of spinal nerves | It is too small to supply anything |
| Which part of a spinal nerve root carries impulses into the spinal cord | dorsal root |
| Which part of the spinal nerve root carries impulses from the spinal cord to an effector | ventral root |
