antagonistic muscles ks 3 science. how do muscles work? muscles can only pull. muscles pull when...
TRANSCRIPT
How do muscles work?
Muscles can only pull.
Muscles pull when they contract.
Muscles get shorter and fatter when they contract.
Muscles usually work as pairs pulling in opposite directions – these are called antagonistic
muscles.
Muscles are attached to bones by tendons.
More antagonistic muscles – the leg:
AB
C
D
What happens if:
Muscle A contracts?
Muscle B contracts?
Muscle C contracts?
Muscle D contracts?
- Leg bends at knee.
- Ankle straightens, pointing toes.
- Leg straightens at knee.
- Ankle bends.