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Brain
spinal cord
It controls behavior

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the system has two main divisions central nervous system and peripheral nervous system

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Central nervous system through the peripheral nerves and other various organs of the human body, the system occurs extremely extensive and complex links.

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The brain is protected by the skull and the spinal cord is protected by the spinal column.

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There's 3 different parts to the nervous system(
Brain, spinal cord, and nerves).

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the brain can send messages at 200+ mph

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How some messages go to our brain but, others can go to our spinal cord, and when it goes to the spinal cord that's how we can react so fast

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Reflexes are involuntary actions

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The  brain send messages to the body and tells it what to do.

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The brain sends messages to the body to tell it what to do

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There are many involuntary actions that only go to only the spinal  cord and not the brain:
Blinking: Removes debris and keeps debris from getting in. It also moistens the eye to keep the eyelids from sticking to the eyeball.
Pulling finger away from heat: Keeps your finger from being obliterated.

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The spinal column protects the spinal cord

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The brain makes the heart beat and sends messages to the rest of the body. message and control center.

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Reflexes are connected to the spinal cord, so it can send messages to the brain about any stimulus

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There are three parts to the brain. The cerebellum, cerebrum, and the medulla

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Having a fever can be a good thing and a bad thing it will tell you that you are infection and helps the infection to not multiply

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Cerebrum, Cerebellum, Medlla

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controls involuntary muscles, heartbeat, breathing, digestion, and circulation

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controls coordination, balance, posture

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Controls thinking, 5 senses, memory, speech, voluntary muscles

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Somatic: Actions you control - voluntary
Autonomic: Actions you do not control - involuntary
Impulses: Electrical charges send messages to/from brain

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Your body's nerves - Neurons are specialized nerve cells

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Your brain and spinal cord

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Your body's message and control center