Your heart is in your chest. It is made of muscle.
It sits between your lungs, a little to the left.
It is about the size of your fist.
Your heart has four chambers.
Each beat makes a lub-DUB sound.
Your heart pumps blood through your body.
Blood carries oxygen and nutrients to your cells.
Your lungs add oxygen to your blood.
Arteries carry blood away from the heart. Veins carry it back.
Run, bike and swim. They are good for your heart.
Words to know
- chambers: rooms inside
- oxygen: air you need
- arteries: blood tubes
- veins: blood tubes
