Human Nervous System (1)

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Human nervous system

An important control system in body coordination

Central nervous system

Brain and spinal cord

Peripheral nervous system

Cranial nerves and spinal nerves

Function of human nervous system

Controls and coordinates organ and parts of the body

Two types of responses of the human body to stimuli

Voluntary actions and involuntary actions

Voluntary actions

Conscious actions and conducted under one's will

Involuntary actions

Actions that occur immediately without conscious control or prior thoughts

Two classification of involuntary actions

Involving medulla oblongata and involving spinal cord

Example of reflex actions involving spinal cord

Withdrawing hand when it accidentally touches a hot object

Example of actions involving medulla oblongata

Heartbeat and breathing

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