intro to the nervous system
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Intro to the Nervous System. What are the major organ systems of the body?. Circulatory Digestive Endocrine Integumentary Muscle Reproductive Respiratory Skeletal Urinary/Excretory. Nervous. What is the nervous system?. What is the nervous system?.

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what are the major organ systems of the body
What are the major organ systems of the body?
  • Circulatory
  • Digestive
  • Endocrine
  • Integumentary
  • Muscle
  • Reproductive
  • Respiratory
  • Skeletal
  • Urinary/Excretory
  • Nervous
what is the nervous system1
What is the nervous system?
  • It is the coordinator of all voluntary and involuntary actions and senses of the body.
    • Movement, breathing, vision, touch, taste…

Your Body

Nervous System

what is the nervous system2
What is the nervous system?
  • There are 2 parts to the nervous system:

Central Nervous

System (CNS)

Brain

Spinal Cord

Peripheral Nervous

System (PNS)

Nerves (Neurons) that connect to the CNS

peripheral nervous system pns
Peripheral Nervous System (PNS)
  • Connects the limbs and organs to the central nervous system.
  • Contains 2 major types of neurons:

Sensory

Neurons

Motor

Neurons

Send signals

to the CNS

Receives signals

from the CNS

motor neurons
Motor Neurons

Leads to movement

Axon extends

through body

Controls muscle response

Body in CNS

central nervous system cns
Central Nervous System (CNS)
  • Spinal cord serves as the relay system for signals from the PNS to reach the brain, (and vice versa).

Spinal cord

Periphery

the brain is a processing center
The Brain is a processing center
  • The brain takes in the signals produced by sensory neurons.
  • The brain processes all signals and responds by sending out impulses to the motor neurons.
  • The brain controls all of our body functions through the autonomic and somatic nervous systems.
voluntary vs involuntary
Voluntary vs. Involuntary
  • The autonomic nervous system regulates the function of our internal organs, working reflexively to keep the body alive and responding to signals we may not even be aware of.
  • The somatic nervous system regulates voluntary movement and responses to stimuli.
what is the nervous system3
What is the nervous system?
  • The CNS consists of the brain and spinal cord, which take in signals and process them to turn them into messages to control the functions of the body.
  • 2 major members of the PNS are sensory and motor neurons which take in signals and respond to signals, respectively.
  • The nervous system has systems to control both voluntary (somatic) and involuntary (autonomic) responses in the body.
nervous system function
Nervous System Function

Peripheral Senses/Stimulation

Motor Response

CNS

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