Nervous System. What is the main function of the nervous system? to receive stimuli from inside and outside the body to interpret the stimuli initiate.

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Presentation transcript:

Nervous System

What is the main function of the nervous system? to receive stimuli from inside and outside the body to interpret the stimuli initiate responses for survival

What are the major organs of the nervous system? Brain Spinal cord Peripheral nerves

Brain An organ of the central nervous system, which has three distinct parts that all serve to control and coordinate the activities of the body.

What are the 3 parts of the brain? cerebrum - controls thoughts, voluntary actions, & the sensations related to the five senses. cerebellum - helps with balance & coordination. brain stem - is located at the base of the brain and controls vital and involuntary processes (for example, breathing, the beating of the heart, and digestion).

3 parts of the brain

Spinal Cord A bundle of nerves that begins at the brain stem and continues down the center of the back through the vertebrae. It connects with the peripheral nerves.

What are the Peripheral Nerves? A network of nerves that branch out from the spinal cord They connect to the rest of the body and transmit signals to and from the brain through the spinal cord.

Neuron Structure Cell Body Dendrites Axon Axon Tips Nucleus

Nerve Cells Aka – Neurons

Neuron Types

Synapse In order for nerve impulses to be carried, they have to cross the synapse. Dendrite Synapse Axon Tip Neurotransmitter

Review What are the major functions of the nervous system? What are the 3 major organs in the nervous system? Which part of the brain controls thought? Which part of the nervous system control arms and legs?

BrainPop: –Brain –Spine –Neuron –Nervous system

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