These bones protect your heart and lungs.
ribs
You use these when you breathe.
lungs
This helps you stand straight and tall.
backbone
You count this to find out how fast your heart is beating.
pulse
This bends so that you can walk or run.
knee
These are connected to your bones and help you move.
muscles
This protects your brain.
skull
This is where your arm bends.
elbow
You think with this.
brain