Skeleton and muscles

How many bones does your skeleton have?

• 650

• 300

• 206

Our muscles are attached to our...

• bones

• skin

• organs

Muscles work in...

• ones

• pairs

• threes

This bone protects your brain:

• Thigh

• Skull

• Rib cage

This is the longest bone in your body

• shin

• spine

• thigh

Your bicep muscles is at the _______ of your upper arm

• front

• back

When one muscle contracts, the other muscle...

• rests

• reflex

• relaxes

Our bodies have more than ______ muscles.

• 350

• 650

• 850