Quiz1. This system pulls on bones

and makes them move.

2. Neck area of the vertebral column.

3. There are how many bones in the body?

4. There are 3 types of joint, fixed, slightly movable, and…

5. This holds bones together and keeps them in place.

6. Is a function of the skeleton.

7. Which bone in the arm joins to the thumb?

• Use the words below to find the answers to the questions.

• Skeletal system

• Shape and support

• Synovial

• Radius

• 206

• Ligament

• Cervical

• Nervous system

• Pivot

• 302

Muscles

By the end of this lesson, you will be able to:

• Identify the muscles in the skeleton.

• Understand how muscles make us move.

Muscles

There are over 300 muscles in our body.

Our muscles help us:

• Digest food

• Blink and smile

• Breath

• Involved in everything we do.

Muscular system

There are 3 different types of muscle in our body

1. Cardiac

- Found in the heart.- Work without conscious

effort.

2. Involuntary

- Found around our organs such as the intestine.

- Work without conscious effort.

3. Voluntary- Attached to bones.- Under our control.

Voluntary Muscle

Activity

Make notes on Voluntary muscle

Include –

• What is it?

• What is it made up of?

Voluntary MusclesVoluntary muscle is - attached to bones

- works when you want it to- often called skeletal or striped

muscle

Voluntary muscle is made up of- Fast and slow twitch fibres- Use more slow twitch fibres

with activities suited to endurance, eg. Jogging, long

distance running.- Use more fast twitch fibres

with activities related to strength and power, e.g. sprinting

and weight lifting.

Muscles and movement

• Every muscle has a job to do.

• There job is to move certain bones.

Fact: Muscles work in pairs.

Take the arm for example

• One muscle contracts (shortens) while the other relaxes (lengthens) and vice versa.

Have a go!

What muscle is contracting?What muscle is relaxing?

Bend knee - ________ contracts (shortens) ________ relaxes (lengthens)

Straighten knee - _______ contracts _______ relaxes

Questions to complete

To jump, we bend our knees and straighten them.

• What main pair of muscles help move the knee?

• What does this working in pairs called?• Give an example from one of your chosen

sports of an antagonist muscle action.• A voluntary muscle is attached to bones with

what?• Explain how having poor muscle tone can

cause bad posture.