1
A muscle that contracts and relaxes to let us breathe in and out.
2
Small organs at the end of the bronchioles, where gas exchange occurs.
3
Two tubes that divide the trachea.
4
A solid tube that carries air to the lungs.
5
The two entry points to the respiratory system, they are on the inside of the nose.
6
Two spongy organs for the air to gets in the body.
