Matching Pairs 3.25 Respiration mosaic Online version Airways concepts by Jorge Arizpe 1 Smalls sacs on the ends of the bronchioles. It is where the external gas exchange takes place. 2 Communicates the pharynx with the trachea and contains the vocal cords 3 Conduces air between the larynx and the lungs. It is formed by cartilage rings. 4 Its functions are to filter, warm and mositen the air as well as to detect smells 5 The trachea is divided in two large structures that are inside the lungs 6 Also called throat it conduces the air to the respiratory system and food to the digestive system