Which structures bring oxygen from the trachea to lungs?

The structures that bring oxygen from the trachea to the lungs are the bronchi. The trachea is a tube that carries air from the larynx (voice box) to the lungs. It divides into two bronchi, which enter the lungs. The bronchi then divide into smaller and smaller tubes called bronchioles, which end in tiny air sacs called alveoli. The alveoli are where oxygen is exchanged for carbon dioxide.