All nervous tissue outside of the central nervous system is part of what nervous system?
The NS outside the central nervous system is called the peripheral nervous system.
These are nerves that extend from the brain (cranial nerves) and spinal cord (spinal nerves).
These two systems communicate with each other to make sure our body parts, such as our fingers, can send signals to the central nervous system for processing in our brains.
- Divisions of the Peripheral Nervous System:
There are two functional divisions of the peripheral nervous system the afferent (sensory) division and the efferent (motor) division.
It helps to learn the meaning of some of the words used here. Afferent means to bring into. And efferent means to go out.
Sensory receptors are found at the ends of peripheral neurons and detect changes (i.e. are stimulated) in their surroundings.
Once stimulated, sensory receptors transmit a sensory impulse to the CNS.
Motor impulses are carried from CNS to responsive body parts called effectors and a motor impulse is carried on a motor neuron to effectors. There two types:
muscles (that contract)
glands (that secrete a hormone)