There are over 600 muscles in the human body that are controlled by the nervous system. There are three main types of muscles: skeletal muscles which are attached to bones and help with movement, smooth muscles found in organs like the intestines and stomach, and cardiac muscle which makes up the heart. Muscles work by contracting when the brain sends a signal through nerves, and relax when the signal stops, allowing for movement.

1. THE MUSCULAR SYSTEM

2. WHAT IS IT?
• There are over 600 muscles in the human body.
• Our muscles are controlled by the nervous system. The nervous system
makes the muscles contract and relax!

3. WHAT IS IT?
• Skeletal Muscles
• These muscles are joined to the
bones with tendons. In order to work
the muscles are in pairs.
• They give your body power and
strength.
• They are attached to your bones and
stretched across a joint.
• An example of this would be triceps
and the biceps.
There are three different types of muscles in the body:

4. WHAT IS IT
• Smooth muscles
• You can find these muscles in some organs.
• Some of these organs include the
intestines, bladder and the stomach.
• The cardiac muscle
• This muscle makes up our heart and keeps
it beating.

5. WHAT MUSCLES DO WE HAVE?

6. HOW DOES IT WORK?
• When you want to move, your brain sends a
message down your spinal chord and to the
nerves.
• This then contracts the muscle you want to
move. Then the muscles send a message back
to the brain allowing you to move smoothly.

7. HOW CAN YOU BUILD STRONG
MUSCLES?
• Playing sports.
• Lifting weights.
• Eating a balanced diet, especially
protein! (Meat, eggs and tofu)