1.
Organ that mucus comes from
2.
A long, U-shaped tube that connects your larynx (voice box) to your lungs
3.
A large airway that leads from the trachea (windpipe) to a lung
4.
The pair of spongy, pinkish-gray organs in your chest
5.
The major muscle of respiration
6.
A cage of bones that protect your lungs and heart
7.
The chemical that you use to breath
8.
The chemical that you breath out
9.
Movement of anything from a low concentration to a high concentration
10.
Air passages inside the lungs
11.
Tiny air sacs at the end of the bronchioles
12.
delicate blood vessels that exist throughout your body and transmit oxygen
