RESPIRATORY SYSTEM

Front

It is a long tube. The air goes down this tube.

Back

windpipe

Front

When we breathe in, what enters our lungs and passes into the blood?

Back

oxygen

Front

The windpipe is also called

Back

trachea

Front

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

Back

carbon dioxide

Front

They are two sacks protected by the ribs.

Back

lungs

Front

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

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

Back

alveoli

Front

Oxygen enters the lungs through ______.

Back

bronchi

Front

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

Back

breathe in

Front

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

Back

breathe out

Front

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

Back

nostrils