NERVOUS SYSTEM.  Functions: 1. Receives information about what is happening inside & outside of the body. 2. Directs the way your body responds to this.

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Presentation transcript:

NERVOUS SYSTEM

 Functions: 1. Receives information about what is happening inside & outside of the body. 2. Directs the way your body responds to this information. (Remember stimulus and response?). 3. Helps maintain homeostasis. BrainPop Video – Nervous System

ORGANS OF THE NERVOUS SYSTEM  Brain  Nerves (neurons – nerve cells)  Spinal Cord

CENTRAL NERVOUS SYSTEM  Brain - c ontrols most functions in the body  Cerebrum  Interprets input from the senses  Controls movement of skeletal muscles  Complex mental processes (learning)  Cerebellum  Coordinates muscle actions & balance  Brainstem (medulla)  Controls involuntary actions (ex: breathing)  Spinal cord - link between brain & the rest of the body

PERIPHERAL NERVOUS SYSTEM  Neurons  nerve cell that is specialized to transfer messages in the form of fast-moving electrical energy  electrical messages are called impulses

PERIPHERAL NERVOUS SYSTEM  Path of nerve impulse: sensory neuron spinal cord brain spinal cord motor neuron Video Clip: Senses & the Nervous System

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