1
When you ________, oxygen goes into your lungs.
2
Oxygen goes into your ________ when you breathe in.
3
The ________ moves around your body.
4
The heart ________ blood around your body.
5
Your ________ pumps blood around your body.
6
Your body needs ________ to stay healthy and strong.
7
Your body makes ________ when it uses oxygen.
8