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Unit 19: Biology Part 2 Page 25 of 137

Objectives

Lesson 5: Controlling the Body

How do you keep your balance  The causes and symptoms of

while riding a bike? Why do some common diseases of
certain things smell and taste so the nervous system
good? How does our brain keep all
the parts of our body doing their
jobs, while still allowing us to learn
and remember new things? The
answer to these, and many more,
questions, can be answered by
learning about the nervous system.

This group of organs is so
important because it controls all
the other systems in our body.

There is just no way we’d be able
to survive without it. In this
section, we’ll talk about the most
important organs of the nervous
system, how they work, and what
happens if they don’t work. You
will learn:

 The parts of the brain, and
what each part does
 The structure and function of
nerve cells
 How messages are passed
from the body to the brain
and back to the body

 How the sense organs allow
us to see, hear, touch, smell,
taste and keep our balance

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