When we breathe in...................enters our lungs and passes into the blood.

The windpipe is also called

When we breathe out , ................. leaves our body.

They are two sacks protected by the ribs.

Inside the lungs there are lots of little sacks called.......

Here, oxygen passes into the blood and carbon dioxide leaves the blood.

They are two tubes .Oxygen enters the lungs through .......

When we ........................ oxygen goes down the windpipe

When we ................... carbon dioxide leaves our body.

When we breathe in , oxygen enters the body through our mouth or ............

The respiratory system includes:

(click on all correct answers)

Which is NOT a part of the respiratory system?

When we breathe in, we take ______ from the air.

After we breathe in the air, it goes through our _______ before it gets to our lungs.

What can't your body store?

_______________ is the main process of the respiratory system which carries air to lungs.

How many lungs do you have in your body?

Your lungs are surrounded by your _____________.

Everytime you take a breath, the ____________ contracts and moves downward and your ribcage expands.

When you _______________, air enters your body through your nose or mouth.

When you _______________, air enters your body through your nose or mouth.

When your lungs take in oxygen, they send out ____________________.

___________________ keeps your lungs in shape.