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Nervous System and
5 Sense Organs
l Parts of nervous system
l Brain, Spinal Cord, The Nerves
Inside
Inside
the
the l Nerve cell – structure and types
Chapter l Reflex action
Chapter
l The structure of sense organs eyes, ears, nose, tongue, skin and
their care.
You have learnt in the previous class that a cell
is the smallest living part of our body. Cells
working together in groups are called tissues .
Each kind of tissue does a certain job. Tissues
working together and forming body parts are
called organs . Several organs, working
together to do one job, make up an organ
system. Several systems work together as a
team in the human body. How is it possible?
How are you able to see, smell, feel, hear think
and learn? All this is possible because of the
nervous system. It is a very important system
of the body. It makes us aware of our
surroundings. It coordinates and controls
other systems of the body.
THE NERVOUS SYSTEM
The nervous system is made up of three main
parts, that are brain, spinal cord and nerves.
The Brain
The BrainThe Brain
The brain is a very important organ. It is called the
commander of the body. It is the control centre of
the nervous system. It is divided into three major
,
parts : cerebrum cerebellum and medulla (brain
Brain
s t e m ) .
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