Nervous System

THE NERVOUS SYSTEM

THE HUMAN BODY

INDEX

1. FUNCTION

2. PARTS

4. THE SENSE ORGANS

3. THE NEURON

The Nervous System controls everything that happens in your body.It also provides us with information from the environment, prepares responses to that information and sends commads to the rest of the organs to respond to those stimuli.

THE NERVOUS SYSTEM IS MADE UP OF:

1. THE CENTRAL NERVOUS SYSTEM
   1. THE BRAIN
   2. THE SPINAL CORD
2. THE PERIPHERAL NERVOUS SYSTEM
   1. THE NERVES

THE CENTRAL NERVOUS SYSTEM IS MADE UP OF:

1. THE BRAIN
2. THE SPINAL CORD

THE BRAIN AND THE SPINAL CORD RECEIVE INFORMATION FROM THE SENSE ORGANS AND PREPARE COMMANDS TO RESPOND TO THAT INFORMATION. THE BRAIN IS IN CHARGE OF THE VOLUNTARY MOVEMENTS WHILE THE SPINAL CORD IS RESPONSIBLE FOR REFLEX MOVEMENTS.

THE PERIPHERAL NERVOUS SYSTEM IS MADE UP OF NERVES (GROUPS OF NERVE CELLS OR NEURONS)

Neurons are the specific nervous system cells. They transmit information through nerves around the body. There are two types of neurons:1.- Sensory neurons detect information (stimuli) from the environment and send it to the brain or the spinal cord.2.- Motor neurons receive commands from the brain or the spinal cord and send them to the muscles and organs.According to the information received through sensory neurons, the brain (or the spinal cord) prepare a response (also based on experience) and send commands to the organs and muscles through the motor neurons.

NEURONS

Dendrites

DENDRITES ARE LIKE TENTACLES REACHING OUT FROM THE CELL BODY. THEY RECEIVE MESSAGES FROM OTHER NEURONS.

Nucleus

THE NUCLEUS IS THE NEURON'S CONTROL UNIT.

Axon

THE AXON IS A LONG TUBE THAT PASSES MESSAGES TO THE DENDRITES OF OTHER NEURONS.

Cell body

THE CELL BODY CONTAINS THE NUCLEUS THAT CONTROLS THE CELL AND OTHER ORGANELLES THAT KEEP IT ALIVE AND WORKING.

CLICK ON THE NEURON TO PLAY A GAME...

THE CEREBRUM

THE CEREBRUM IS THE LARGEST PART OF THE BRAIN. IT CONTROLS COMPLEX BRAIN FUNCTIONS SUCH US THINKING.

BRAIN ANATOMY

THE CEREBELLUM

THE CEREBELLUM HELPS US KEEP BALANCE AND CO-ORDINATE MOVEMENTS.

THE BRAIN STEM

THE BRAIN STEM CONNECTS THE BRAIN TO THE SPINAL CORD AND CONTROLS BASIC FUNCTIONS SUCH AS HEARTBEAT AND DIGESTION.

THE SENSE ORGANS

THE EYE

THE EAR

THE TONGUE

THE NOSE

THE SKIN