Transcript Nervous System

Nervous System
Carries messages to
and from the brain
and spinal cord and
all other parts of the
body.
The Nervous
System Consists
of the:
Brain, Spinal Cord
& Branching
Nerves
The Nervous System is
divided into two systems:
Central Nervous
System
&
Peripheral Nervous
System
The Central
Nervous System
The Central Nervous
System consists of the:
Brain
&
Spinal Cord
The Brain is a
mass of
Nerve
Tissue
3 Parts of the Brain
are:
1. Cerebrum
2. Cerebellum
3. Brain Stem
The Cerebrum
Controls:
Ability to Memorize,
Think,
&
Learn
The Cerebellum
Controls:
Coordination of
muscle activity.
The Brain Stem
Includes the
Medulla and controls
Involuntary
Actions
The Spinal Cord
Is a thick band of nerve
cells that extends through
the backbone.
There are 31 pair of spinal
nerves branching from it.
The Peripheral
Nervous System
The Peripheral
Nervous system
consists of
Cranial Nerves
&
Spinal Nerves
There are:
12 Pair of
CRANIAL NERVES
There are:
31 Pair of
SPINAL NERVES
Cranial Nerves
control
Senses
&
Motor Activity
Spinal Nerves
TRANSMIT
information
To & From All
Parts of the Body
Neurons
Are NERVE Cells.
There are 2 types of
Neurons:
Sensory
&
Motor Neurons
Sensory Neurons:
Carry messages
FROM sense organs
TO the brain.
Motor Neurons:
Carries message
FROM THE BRAIN
TO MUSCLES & GLANDS
Controls ability to
memorize, think, learn
Controls coordination of
Muscle activity
Contains the medulla which
controls involuntary actions
such as heart rate and
breathing