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Nervous System (Sensory Signals: Move toward CNS (Somatic Sensory Fiber…

- - - - the external surface of a body
    - - the layer of tissue that covers the body
- - - - Provide structural support for the neuron cell bodies and help regulate what enters and leaves the neuron cell bodies
  - - - helps maintain the correct chemical (sodium, potassium, calcium and chloride) environment which is important for electrical signal transmission
    - - a phagocyte that breaks down dead cells by taking them into their cell body
    - - forms a cuboidal / columnar epithelium that line the ventricles of the central cavity of the spinal cord and brain. They contain cilia that move and circulate cerebrospinal fluid and microvilli that absorb stuff from blood vessels to make the cerebrospinal fluid
  - - - Schwann Cells:
        
        insulates and allows signals to travel more rapidly in the PNS
    - - Oligodendrocyte
        
        insulates and allows signals to travel more rapidly in the CNS
- - - - cluster of neurons cell bodies located in the CNS
    - - made of tracts of myelinated and unmyelinated axons that carry messages
    - - the gray area apart of the CNS that contains cell body, nucleus, dendrites and unmyelinated neurons
        
        Integration:
        
        located in the gray matter of the CNS at the synapse between the sensory neuron and the motor neuron
  - - - an organ that is the central control point for the nervous system located inside the skull
    - - a bundle of nerve fibers that connect parts of body to the brain
- - - - 12 pairs of nerves that attach to the brain
    - - the nerves that attach to the spinal cord
    - - a collection of neuron cell bodies
    - - a projecting appendage of a body
    - - a collection of neuron axons