Answer to Question #307327 in Human Anatomy and Physiology for Martha

Question

What carries air to and from lungs?

Answer 1

Air enters the body from inhaling through the nose or mouth and then moves to the throat. From there, it passes through the voice box, and down the windpipe . The windpipe is the airway leading from your throat to your lungs. It divides into the two main bronchial tubes , one for each lung, which divides further into each lobe of your lungs. These, in turn, split into the tiniest branching of the bronchial tubes called bronchioles, at the end of which are the air sacs .

The exchange of oxygen and carbon dioxide from the bloodstream takes place in the air sacs. The carbon dioxide molecules in the alveoli are blown out of the body through the windpipe and out the nose or mouth the next time a person exhales.