Page 17 - Summary 6 2025

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

Moving muscles

(Skeletal system and muscular system interaction)

When your forearms is pulled When your forearm moves down

The front muscle (Contract) The front muscle (relaxes)

The back muscle (relaxes)

The back muscle (Contacts)

Notes

1. The skeletal muscles that are attached to the bones of skeletal system (such as
the bones of fingers, legs, arms and other body parts) contract and relax to allow
these bones to move.
2. The muscle can only exert force when it contracts.

3. The contraction of muscles moves the bones in one direction only.

4. The skeletal muscles are often work in pairs and move in opposite directions as
shown in the previous example.

14