Locomotor System

The heart is

• a voluntary muscle

• an involuntary muscle

The longest bone in your body is the femur

• It is in your arms.

• It is in your legs

They are where two bones meet

• muscles

• joints

They are hard and rigid .They cannot bend. There are two hundred and six.

• Bones

• muscles

They are flexible and elastic. We can stretch them.There are six hundred.

• joints

• muscles

They protect heart and lungs

• skull

• ribs

shoulders , elbow , wrist, knee , ankle are

• joints

• bones

It protects the brain

• ribs

• skull

They form the skeleton

• joints and muscles

• bones

Elbows and knees are

• muscles and bones

• joints