The Nervous SystemThe Nervous System

Communication & CoordinationCommunication & Coordination

Functions of the Nervorus Functions of the Nervorus SystemSystem

Communicate Information: From the outside Communicate Information: From the outside world into the body and from within the bodyworld into the body and from within the body

Coordinate Activity: Controls all of your Coordinate Activity: Controls all of your body’s functions, both voluntary and body’s functions, both voluntary and involuntaryinvoluntary

ProcessProcess

1. Sense organs (eyes, 1. Sense organs (eyes, ears, mouth, nose, skin) ears, mouth, nose, skin) bring in info to the brainbring in info to the brain

2. Other organs in the 2. Other organs in the body send info to the brainbody send info to the brain

3. Brain processes 3. Brain processes informationinformation

4. Brain sends message 4. Brain sends message for any activityfor any activity

ALL MESSAGINGALL MESSAGINGis performed by neurons, is performed by neurons, chemicals and electricitychemicals and electricity

Autonomic Nervous SystemAutonomic Nervous System

This controls all automatic, involuntary This controls all automatic, involuntary functions such as body temperature control, functions such as body temperature control, heart beat, and breathingheart beat, and breathing

HAS TWO divisions, the SYMPATHETIC HAS TWO divisions, the SYMPATHETIC and the PARASYMPATHETICand the PARASYMPATHETIC

Sympathetic Nervous SystemSympathetic Nervous System

In response to information, this system gets the In response to information, this system gets the body ready for FIGHT or FLIGHTbody ready for FIGHT or FLIGHT Pupils dialatePupils dialate Heart Rate increases as blood pressure increasesHeart Rate increases as blood pressure increases Blood moves from organs to limbs in preparation for Blood moves from organs to limbs in preparation for

activityactivity Endorphins are releasedEndorphins are released

Parasympathetic Nervous Parasympathetic Nervous SystemSystem

This system restores equilibrium to the body This system restores equilibrium to the body and reverses the amping up the actions of and reverses the amping up the actions of the sympathetic Nervous Systemthe sympathetic Nervous System

Somatic Nervous SystemSomatic Nervous System

This part of your nervous system controls This part of your nervous system controls ALL voluntary functionsALL voluntary functions Actions you initiateActions you initiate

Running or Scratching an itchRunning or Scratching an itch Dancing, drawing, playing an instrumentDancing, drawing, playing an instrument Doing CPRDoing CPR

Interesting FactsInteresting Facts

Meningitis- a serious illness caused by a Meningitis- a serious illness caused by a virus or bacteria in your meingies. virus or bacteria in your meingies. Symptoms include high fever, aches, and Symptoms include high fever, aches, and head aches.head aches.

Spinal injury-severed or damaged nerve Spinal injury-severed or damaged nerve signals are not delivered past that point.signals are not delivered past that point.