UNIT 3: THE LOCOMOTOR SYSTEM

UNIT 3 THE LOCOMOTOR SYSTEM

 

INDEX

 1. THE LOCOMOTOR SYSTEM

            1.1  THE SKELETON

           1.2  THE MUSCULATURE

           1.3  TYPES OF MOVEMENTS

 

1.      THE LOCOMOTOR SYSTEM

 The locomotor system is responsible for carrying out the muscular responses created by the

nervous system. These responses create movement.

The locomotor system is made up of:

 
                1.1  The skeleton

The skeleton holds up and shapes the body and it protects some delicate organs,like the brain or heart. It's made up of:

•         Bones that are hard and rigid organs.

•         Joints that are the unions between two or more bones.

•         Cartilages that are more flexible than bones .They protect the joints and create flexible structures like the ears.

 

                  1.2.-The musculature

       The musculature is made up of all the muscles in the body. Tendons attach muscles to the bones.

       Muscles are responsible for movement . They can contract and relax.

 

                  1.3.-Types of movements

      There are two types of movements:

•         Voluntary movements,respond to an order from the brain.

•         Involuntary movements,respond to an order from somewhere else :spinal cord and brain stem.

 

ACTIVITIES

1.- Define the following words: bones, joints and cartilages.

Bones: ________________________________________________________________________________________________________________________________

Joints: ________________________________________________________________________________________________________________________________

Cartilages:

________________________________________________________________________________________________________________________________

 

2.- Fill in the gaps.

The _______________________ is made up of _____________ and _________________.

The skeleton is made up of ________________ , __________________ and ____________________.

Voluntary movements respond to an order from __________________ .

Involuntary movements can respond to an order from ______________ and ____________________ .

 

3.- Could you write two examples of involuntary movements? Why?

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