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Central nervous system
(CNS) Composed of the brain and the spinal cord. This is the part of the nervous system that does most of the information processing.
Peripheral nervous system
(PNS) Contains all the neurons involved in receiving information and sending it on to the spinal cord and brain.
Deals with the "higher-level" brain functions. These would include interpreting signals, learning, reasoning, and memory.
It controls the more basic functions of the human body, such as breathing, heart rate, and the pressure at which blood is pumped through the body.
Autonomic nervous system
The system of nerves which carries instructions from the CNS to the body's smooth muscles, cardiac muscle, and glands.
Sensory nervous system
The system of nerves which carries information from the body's receptors to the CNS.
Somatic motor nervous system
The system of nerves which carries instructions from the CNS to the skeletal muscles.
Part of the autonomic nervous system that increases the rate and strength of the heartbeat and raises the blood pressure.
Part of the autonomic nervous system that slows the heart rate and lowers the blood pressure.
Where light first passes through in the eye; covered with a thin layer of clear tissue that is kept moist and clean.
Tiny bones in the middle ear that move back and forth as a result of the ear drum vibrating.
Snail-like shape that responds to the vibration of the ossicles by transforming it into electrical signal and sending it on to the brain to be interpreted as sound.
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