Page 19 - e book prim 6

Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025

Examples of Voluntary muscle (Skeletal muscles)

❶Upper arm muscles

When you bend your arm When you straighten your arm

muscle in front of your upper arm The muscle in front of your upper
contracts and the muscle in the arm relaxes and the muscle in the
back of your upper arm relaxes back of your upper arm contracts.

❷Neck muscles

- Moving your head up and down depends on two
important neck voluntary muscles, where:

When you move your head up, one of these muscles
contracts.

When you move your head down, the other muscle
contracts.

❸Forearm muscles

- Turning your hand depends on two important forearm voluntary
muscles, where:

When you turn your hand When you turn your hand

over down

(Your palm up), one of (Your palm down), the

these muscles contracts. other muscle contracts.

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