nervous system

4. bundles of fibers that transmit impulses of sensation to the brain
5. the main trunk of the brain continuing downward to form the spinalcord
9. a feeling of being worried
11. the network of nerve cells and fibers that transmits nerve impulses between parts of the body.
14. a short branched extension of a nerve cell
15. a complex system of nerves and networks in the brain, involving several areas near the edge of the cortex concerned with instinct and mood

1. the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.
2. the principal and most anterior part of the brain
3. an action that is performed as a response to a stimulus and without conscious thought.
6. the part of the nervous system responsible for control of the bodily functions
7. a specialized cell transmitting nerve impulses; a nerve cell.
8. the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity.
10. the other half next to the spinal cord
12. a junction between two nerve cells
13. the cylindrical bundle of nerve fibers and associated tissue that is enclosed in the spine and connects nearly all parts of the body to the brain