Skeleton and Muscles.

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Presentation transcript:

Skeleton and Muscles

What’s inside our body? Bones 骨頭

What’s inside our body? Skeleton 骨骼 Bones

How important is our skeleton to us?

Functions of the skeleton Supports our body

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

Functions of the skeleton Supports our body Protects the organs inside

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.

How does our body move? Bones Joints Muscles

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

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.

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

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

Conclusion

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