The location where gas exchange occurs in the lungs as a part of the respiratory system is primarily in the alveoli. Alveoli are small air sacs located at the end of the bronchioles, which are small branches of the bronchi. Gas exchange occurs in the alveoli, where oxygen from inhaled air enters the bloodstream and carbon dioxide from the bloodstream is expelled into the alveoli to be exhaled. The bronchi and bronchioles are responsible for conducting air to and from the alveoli, while the epiglottis and larynx play a role in protecting the airways during swallowing and producing vocal sounds, respectively, but they are not directly involved in gas exchange.
