Respiratory Structure & Function

Larynx

Nose

Pharynx

Tubes that branch off the lower end of the trachea and carry air to the lungs.

The trachea is a tube that connects the larynx to the bronchi, allowing air to pass to and from the lungs.

The diaphragm contracts and flattens to create a vacuum that pulls air into the lungs.

Tiny air sacs in the lungs where gas exchange occurs.

To facilitate the exchange of oxygen and carbon dioxide between the body and the environment.

A flap of tissue that covers the trachea during swallowing to prevent food from entering the airway.

The upper respiratory tract includes the nose, nasal cavity, and pharynx; the lower respiratory tract includes the larynx, trachea, bronchi, and lungs.