1) The beating of you heart is a sign of life. Even when you sleep your heart continues to beat steadily. Why is the beating of your heart an essential process?

• beating of heart signifies that blood circulated in the body.

2) Why do we need to breathe?

• We breathe because the body needs oxygen and gets rid the carbon dioxide.

3) What do you think happens to the air we breathe in?

• The air will enter to our lungs and bloodstream.