Nervous system

5. Junction between two neurons where neurotransmitters are released to pass signals.
6. Nerves that carry sensory signals toward the brain and spinal cord.
9. cells Cells that line the brain ventricles and spinal cord, helping circulate cerebrospinal fluid.
10. Cells in the CNS that form the myelin sheath around nerve fibers.
11. Basic functional units of the nervous system that transmit electrical signals.
12. Regulates involuntary functions like heart rate, digestion, and breathing.
13. Branch-like structures that receive signals from other neurons.

1. Controls voluntary movements of skeletal muscles.
2. All nerves outside the brain and spinal cord that connect the CNS to the body.
3. Brain and spinal cord; the main control center of the body.
4. Long extensions of neurons that carry impulses away from the cell body.
5. cells Cells in the PNS that produce myelin for peripheral neurons.
7. Fatty covering that insulates axons and speeds up nerve impulses.
8. Nerves that carry motor commands away from the brain and spinal cord to muscles and glands.