1. Skeleton and Muscles

2. What’s inside our body?
Bones 骨頭

3. What’s inside our body?
Skeleton 骨骼
Bones

4. How important is our skeleton to us?

6. Functions of the skeleton
Supports our body

8. Different bones in the body
Skull 頭骨
Rib cage 胸腔
Protects the brain
Protects the heart and lungs

9. Functions of the skeleton
Supports our body
Protects the organs inside

10. Why can our limbs 四肢bend?
Joints 關節
Connect the bones so we can bend(彎曲) and straighten(伸直) different parts of the body.

11. How does our body move?
Bones
Joints
Muscles

12. How does the arm move?
Biceps
二頭肌
Triceps
三頭肌
Joint

13. The bicep contracts or shortens, pulling the lower arm up, and causing the elbow to bend. At this time the triceps relaxes or lengthens. To straighten the elbow it is then the tricep which contracts or shortens in order to pull the lower arm down, and at this time the bicep relaxes.

14. Functions of the skeleton
Support our body
Protect the organs inside
Work with muscles to help us move

15. Protect our skeleton! Regular exercise Wear protective equipment
Eating enough dairy products which are rich in calcium

16. Conclusion

17. Functions of skeleton __________ the body Support
__________ the body organs
Protect
Bones working with __________ and __________ to help us move
joints
muscles
__________ : the brain
__________ : the heart and lungs
Skull
Rib cage
Example
When the arm bends: __________ contracts, __________ relaxes
When it straightens: __________ contracts, __________ relaxes
biceps
triceps
triceps
biceps